1987 Developmental Stages In Human Embryos - Appendix 1: Difference between revisions

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The specimens in the excellent embryological collection of Professor E. Blechschmidt were assigned Carnegie Nos. 10315-10434 in 1972 because Professor Blechschmidt's wish was and is to have his collection combined with the Carnegie Collection. The Blechschmidt Collection is at present housed temporarily in the Department of Anatomy of Louisiana State University, New Orleans, and is under the care of Dr. Raymond F. Gasser. The collection has served as the basis of two important atlases (Blechschmidt, 1963, 1973), and the appropriate three-dimensional reconstructions are housed in the Anatomisches Institut der Universitat Gottingen. The staging of these embryos has not been completed and hence they are not in- cluded in the following lists.
The specimens in the excellent embryological collection of Professor E. Blechschmidt were assigned Carnegie Nos. 10315-10434 in 1972 because Professor Blechschmidt's wish was and is to have his collection combined with the Carnegie Collection. The Blechschmidt Collection is at present housed temporarily in the Department of Anatomy of Louisiana State University, New Orleans, and is under the care of Dr. Raymond F. Gasser. The collection has served as the basis of two important atlases (Blechschmidt, 1963, 1973), and the appropriate three-dimensional reconstructions are housed in the Anatomisches Institut der Universitat Gottingen. The staging of these embryos has not been completed and hence they are not included in the following lists.


[[Blechschmidt Collection]]
{{Online Editor}} - The [[Blechschmidt Collection]] has subsequently been returned to Göttingen University. These embryos have been scanned as part of the [[Digital Embryology Consortium - Information|Digital Embryology Consortium]].


==Stage 2==
==Stage 2==


8190 8260 8450 8452 8500.1 8630 8698 8904
{| class="wikitable"
|-
! Serial No. !! Normality !! No. of Blastomeres !! Size of Fixed Specimen (µm) !! Fixative !! Embedding Medium !! Thinness (µm) !! Stain  !! Year !! Notes
|-
| [[:Category:Carnegie Embryo 8190|8190]] || abnormal || 9 || 160x104 || Alc. & Bouin || C-P || 6 || Iron h., or G  || 1943 || Hertig et al. (1954)
|-
| 8260 || in vitro || 2 || 50x75 || Bouin || C-P || 8 || {{HE}} || 1944 || Menkin and Rock (1948)
|-
| 8450 || abnormal || 8 || 100x96 || Alc. & Bouin || C-P || 6 || {{HE}}, phlox. || 1947 || Hertig et al. (1954)
|-
| 8452 || abnormal || 12 || 110x93 || Alc. & Bouin || C-P || 6 || {{HE}}, phlox. || 1946 || Hertig et al. (1954)
|-
| 8500.1 || in vitro || 3 || 50x86 || Bouin || C-P || 8 || {{HE}}. || 1947 || Menkin and Rock (1948)
|-
| 8630 || abnormal || 5 || 104x94 || Alc. & Bouin || C-P || 6 || {{HE}} || 1948 || Hertig et al. (1954)
|-
| 8698 || normal || 2 || 122x88 || Alc. & Bouin || C-P || 6 || {{HE}} || 1949 || Hertig et al. (1954)
|-
| 8904 || normal || 12 || 115 || Bouin || col span="3"| Specimen lost || || || 1951 || Hertig et al. (1954)
|}
 
[[1987 Developmental Stages In Human Embryos - Stage 2|1987 - Stage 2]] | [[Carnegie stage 2]]
 
{{Carnegie Collection stage 2 table}}


==Stage 3==
==Stage 3==
{| class="wikitable"
|-
! Serial No. !! Normality !! No. of Blastomeres !! Size of Fixed Specimen (µm) !! Fixative !! Embedding Medium !! Thinness (µm) !! Stain  !! Year !! Notes
|-
| {{CE8663}} || normal || 107 || 103x80 || Alc. & Bouin || C-P || 6 || {{HE}} || 1949 || Hertig et al. (1954)
|-
| {{CE8794}} || normal || 58 || 108x86 || Alc. & Bouin || C-P || 6  || {{HE}} || 1950 || Hertig et al. (1954)
|}
{{Carnegie Collection stage 3 table}}


8663 8794
[[1987 Developmental Stages In Human Embryos - Stage 3|1987 - Stage 3]] | [[Carnegie stage 3]]


==Stage 5==
==Stage 5==


===Stage 5a===
===Stage 5a===
8020 8155 8225
 
{| class="wikitable"
|-
! Serial No. !! Grade !! Fixative !! Embedding Medium !! Thinness (µm) !! Stain  !! Year !! Notes
|-
| 8020 || Exc. || Alc. & Bouin || C-P || 6 || {{HE}} || 1942 || Hertig and Rock (1945a)
|-
| [[:Category:Carnegie Embryo 8155|8155]] || Exc. || Bouin || C-P || 6 || {{HE}} || 1943 || Hertig and Rock (1949)
|-
| 8225 || Exc. || Alc. & Bouin || C-P || 6 || {{HE}} || 1944 || Hertig and Rock (1945b)
|}
 
 
[[1987_Developmental_Stages_In_Human_Embryos_-_Stage_5#Stage_5a|1987 - Stage 5a]] | [[1987 Developmental Stages In Human Embryos - Stage 5|1987 - Stage 5]] | [[Carnegie stage 5]]


===Stage 5b===
===Stage 5b===
8004 8171 8215 9350
{| class="wikitable"
|-
! Serial No. !! Grade !! Fixative !! Embedding Medium !! Thinness (µm) !! Stain  !! Year !! Notes
|-
| [[:Category:Carnegie Embryo 8004|8004]] || Exc || Alc. & Bouin || C-P || 6 || {{HE}} || 1942 || Hertig and Rock (1945a)
|-
| 8171 || Exc || Alc. || C-P || 6 || {{HE}} || 1943 || Hertig and Rock (1949)
|-
| 8215 || Exc || Alc. & Bouin || C-P || 6 || {{HE}} || 1944 || Hertig and Rock (1945c)
|-
| 9350 || Exc || Bouin || ? || ? || {{HE}} || 1955 || Heuser (1956)
|}


[[1987_Developmental_Stages_In_Human_Embryos_-_Stage_5#Stage_5b|1987 - Stage 5b]] | [[1987 Developmental Stages In Human Embryos - Stage 5|1987 - Stage 5]] | [[Carnegie stage 5]]


===Stage 5c===
===Stage 5c===
4900 Poor
7699 Exc.
7700 Exc.
7770 Exc.
7771 Exc.
7950 Exc.
8000 Poor
8139 Exc.
8299 Exc.
8329 Exc.
8330 Exc.
8370 Poor
8558 Exc.


{| class="wikitable"
|-
! Serial No. !! Grade !! Fixative !! Embedding Medium !! Thinness (µm) !! Stain  !! Year !! Notes
|-
| 4900  || Poor || p || P || 10 || p || 1925 || Incomplete. Streeter (1926)
|-
| 7699  || Exc. || Bouin || C-P || 6 || {{HE}} || 1939 || Hertigand Rock (1941)
|-
| 7700  || Exc. || Bouin || C-P || 6 || {{HE}} || 1938 || Hertigand Rock (1941)
|-
| 7770  || Exc. || Bouin || C-P || 6 & 10 || {{HE}} || 1940 ||  Abnormal
|-
| 7771  || Exc. || Bouin || C-P || 10 || {{HE}} || 1940 ||  Abnormal
|-
| 7950  || Exc. || Alc. & Bouin || C-P || 6 || {{HE}} || 1941 || Hertig and Rock (1944)
|-
| 8000  || Poor || Alc. & Bouin || C-P || 8 || {{HE}} || 1942 || Abnormal
|-
| 8139  || Exc. || ? || C-P || 6 || {{HE}} || 1943 || Incomplete. Marchetti (1945)
|-
| 8299  || Exc. || Alc. & Bouin || C-P || 6 || {{HE}}, phlox. || 1945 || Abnormal
|-
| 8329  || Exc. || Alc. & Bouin || C-P ||  6 || {{HE}}, phlox. || 1945 || Abnormal
|-
| 8330  || Exc. || Alc. & Bouin || C-P ||  6 || {{HE}}, phlox. || 1945 ||
|-
| 8370  || Poor || Alc. & Bouin || C-P ||  6 || {{HE}}, phlox. || 1946 || Abnormal
|-
| 8558  || Exc. || Alc. & Bouin || C-P ||  6 || {{HE}} || 1947 ||
|-
|}


[[1987_Developmental_Stages_In_Human_Embryos_-_Stage_5#Stage_5c|1987 - Stage 5c]] | [[1987 Developmental Stages In Human Embryos - Stage 5|1987 - Stage 5]] | [[Carnegie stage 5]]
{{Carnegie Collection stage 5 table}}


==Stage 6==
==Stage 6==


Serial
 
No. Grade
{| class="wikitable"
Embedding Medium
|-
? P
! Serial No. !! Grade !! Fixative !! Embedding Medium !! Thinness (µm) !! Stain  !! Year !! Notes
P
|-
P
| 6026 || Poor || ? || ? || 6? || H_&E ||  1929 || Lockyer embryo. Abnormal. Ramsey (1937)
P C-P
|-
STAGE 6 Thinness
| 6734 || Poor || Zenker—acetic || P || 10 || H.&E. || 1934 || Yale embryo. Ramsey (1938)
6026 Poor 6734 Poor 6900 Poor 7634 Poor 7762 Good
|-
7800 Exc.
| 6900 || Poor || Formol || P || 15 || H.&E. || 1940 || Linzenmeier (1914)
7801 Exc.
|-
7850 Exc.
| 7634 || Poor || Formol || P || 10 || H.&E. etc. || 1940 || Torpin embryo. Kraflca (1941)
8290 Exc.
|-
8360 Exc.
| 7762 || Good || Zenker—formol || P || 8 || ? || 1940||  Wilson (1945)
8362 Poor p
|-
6? 10
| 7800 || Exc. || ? || C—P || 8 || H.&E. || 1940 || Abnormal
15 10 8 8 8 6 8 6 6 6 8 6 8
|-
H.&E.
| [[:Category:Carnegie Embryo 7801|'''7801''']]  || Exc. || Bouin || C—P || 8 || H.&E. || 1940 || Heuser et al. (1945)
H.&E.
|-
H.&E.
| 7850 || Exc. || Ale. & Bouin || C—P || 6 || H.&E. || 1940 || Abnormal
H.&E.
|-
?
| 8290 || Exc.||  Bouin || C—P || 8 || H. phlox. || 1944 ||
H.&E.
|-
H.&E.
| 8360 || Exc. || Ale. & Bouin || C—P || 6 || H&E., phlox. || 1944 ||
H.&E.
|-
H. phlox. H.&E., phlox. H.&E., phlox H.&E.
| 8362 || Poor || p || C—P || 6 || H&E., phlox || 1944 ||
H.&E.
|-
H.&E., phlox. H.&E., phlox. Azan
| 8672 || Exc. || Ale. & Bouin || C—P || 6 || H&E. || 1949 ||
8672 Exc.
|-
8819 Exc.
| 8819 || Exc. || Formol—chrom. subl. || C—P || 8 || H.&E. || 1951 || Edwards—Jones—Brewer (H.I496). Brewer (1938)
8905 Poor
|-
8910 Good Formol 9222 Good Bouin 9250 Exc. Bouin 9595 Poor p
| 8905 || Poor || Ale. || p || 6 || H&E., phlox. || 1951 || Abnormal
10003 Good Bouin
|-
6& 10
| 8910 || Good || Formol || C—P || 8 || H&E., phlox. || 1951 ||
8 H.&E. 1954 8 H.&E. 1958 5 V arious 1963
|-
Fixative
| 9222 || Good || Bouin || C—P || 6 & 10 || Azan || 1954 || Abnormal. Possibly stage 7
? Zenker-acetic Formol Formol Zenker-formol
|-
Stain
| 9250 || Exc. || Bouin || p || 8 || H.&E. || 1954 ||
Y ear Notes
|-
1929 Lockyer embryo. Abnormal. Ramsey (1937) 1934 Yale embryo. Ramsey (1938)
| 9595 || Poor || p || p || 8 || H.&E. || 1958 ||
1940 Linzenmeier (1914)
|-
1940 Torpin embryo. Krafka (1941)
| 10003 || Good || Bouin || p || 5 || Various || 1963 ||
1940 Wilson (1945)
|}
1940 Abnormal
 
1940 Heuser et al. (1945)
{{Carnegie Collection stage 6 table}}
1940 Abnormal
 
1944
[[1987 Developmental Stages In Human Embryos - Stage 6|1987 - Stage 6]] | [[Carnegie stage 6]]
1944
1944
1949
1951 Edwards-Jones-Brewer (H.I496). Brewer (1938) 1951 Abnormal
1951
1954 Abnormal. Possibly stage 7
Bouin C-P Ale. & Bouin C-P Bouin C-P
Ale. & Bouin
C-P C-P C-P C-P p C-P C-P p
p p
Ale. & Bouin Formol-chrom. subl. Ale.
etc.


==Stage 7==
==Stage 7==
Line 125: Line 194:
! Serial No. !! Grade !! Fixative !! Embedding Medium !! Thinness (µm) !! Stain  !! Year !! Notes
! Serial No. !! Grade !! Fixative !! Embedding Medium !! Thinness (µm) !! Stain  !! Year !! Notes
|-
|-
| [[:Category:Carnegie Embryo 7802|7802]] || Exc. || Alc. & Bouin || C-P ||  6  || {{HE}} || 1940  || Heuser et al. (1945)
| [[:Category:Carnegie Embryo 7802|'''7802''']] || Exc. || Alc. & Bouin || C-P ||  6  || {{HE}} || 1940  || Heuser et al. (1945)
|-
|-
| 8206 || Good || p || C-P  || 6  || {{HE}} || 1943  ||  
| 8206 || Good || p || C-P  || 6  || {{HE}} || 1943  ||  
Line 131: Line 200:
| 8361 || Good || Bouin || C-P  || 10  || p || 1946 || Abnormal
| 8361 || Good || Bouin || C-P  || 10  || p || 1946 || Abnormal
|-
|-
| 8602 || Exc. || Alc.  || C-P  || 8  || {{HE}} || 1948 ||  
| [[:Category:Carnegie Embryo 8602|'''8602''']] || Exc. || Alc.  || C-P  || 8  || {{HE}} || 1948 ||  
|-
|-
| 8752 || Exc. || ? || C-P  || 10  || {{HE}} || 1950 ||  
| 8752 || Exc. || ? || C-P  || 10  || {{HE}} || 1950 ||  
Line 142: Line 211:


[[1987 Developmental Stages In Human Embryos - Stage 7|1987 - Stage 7]] | [[Carnegie stage 7]]
[[1987 Developmental Stages In Human Embryos - Stage 7|1987 - Stage 7]] | [[Carnegie stage 7]]
{{Carnegie Collection stage 7 table}}


==Stage 8==
==Stage 8==
Line 148: Line 219:
! Serial No. !! Grade !! Fixative !! Embedding Medium !! Plane || Thinness (µm) !! Stain  !! Year !! Notes
! Serial No. !! Grade !! Fixative !! Embedding Medium !! Plane || Thinness (µm) !! Stain  !! Year !! Notes
|-
|-
| 1399 || Poor || Formol || P  || Trans. || 10  || {{HE}} etc.  || 1916  || "Mateer embryo" described by Streeter (1920a)  
| [[:Category:Carnegie Embryo 1399|'''1399''']] || Poor || Formol || P  || Trans. || 10  || {{HE}} etc.  || 1916  || "Mateer embryo" described by Streeter (1920a)  
|-
|-
| 3412 || Poor || Formol  || P || Trans. || 5-15 || Al. coch. E. au., or. || 1921  ||
| 3412 || Poor || Formol  || P || Trans. || 5-15 || Al. coch. E. au., or. || 1921  ||
Line 184: Line 255:
| 8671 || Exc. || Alc. & Bouin || C-P || Sag. || 6 || {{HE}}, phlox. || 1949  ||
| 8671 || Exc. || Alc. & Bouin || C-P || Sag. || 6 || {{HE}}, phlox. || 1949  ||
|-
|-
| 8725 || Exc. || Alc. & Bouin || C-P || Sag. || 6 || {{HE}}, phlox. || 1949  ||
| [[:Category:Carnegie Embryo 8725|8725]] || Exc. || Alc. & Bouin || C-P || Sag. || 6 || {{HE}}, phlox. || 1949  ||
|-
|-
| 8727 || Exc. || Alc. & Bouin || C-P || Trans. || 8 || {{HE}}, phlox. || 1949 || Germ disc folded, possibly double (Hertig, 1968, fig. 180)
| 8727 || Exc. || Alc. & Bouin || C-P || Trans. || 8 || {{HE}}, phlox. || 1949 || Germ disc folded, possibly double (Hertig, 1968, fig. 180)
Line 204: Line 275:


[[1987 Developmental Stages In Human Embryos - Stage 8|1987 - Stage 8]] | [[Carnegie stage 8]]
[[1987 Developmental Stages In Human Embryos - Stage 8|1987 - Stage 8]] | [[Carnegie stage 8]]
{{Carnegie Collection stage 8 table}}


==Stage 9==
==Stage 9==
Line 210: Line 283:
! Serial No. !! Pairs of somites || Size (mm) || Grade !! Fixative !! Embedding Medium !! Plane || Thinness (µm) !! Stain  !! Year !! Notes
! Serial No. !! Pairs of somites || Size (mm) || Grade !! Fixative !! Embedding Medium !! Plane || Thinness (µm) !! Stain  !! Year !! Notes
|-
|-
| 1878 || 2-3 || E., 1.38 <br>Ch., 12X10.5X7.5 || Good || Formol ||  P || Cor. || 10 || {{HE}} || 1917 || Described by Ingalls (1920)
| {{CE1878}} || 2-3 || E., 1.38 <br>Ch., 12X10.5X7.5 || Good || Formol ||  P || Cor. || 10 || {{HE}} || 1917 || Described by Ingalls (1920)
|-
|-
| 5080 || 1 || E., 1.5<br>Ch., 14.5 || Poor || Formol || P || Trans. || 10 || Al. coch. || 1926 || Studied by Davis (1927)
| {{CE5080}} || 1 || E., 1.5<br>Ch., 14.5 || Poor || Formol || P || Trans. || 10 || Al. coch. || 1926 || Studied by Davis (1927)
|-
|-
| 7650 || 2-3 || E., 2-3 || Good || Alc & Bouirl || C-P || Trans. ||  6 || {{HE}} || 1939 || Said to be female (Park, 1957)
| {{CE7650}} || 2-3 || E., 2-3 || Good || Alc & Bouirl || C-P || Trans. ||  6 || {{HE}} || 1939 || Said to be female (Park, 1957)
|-
|-
|}
|}


[[1987 Developmental Stages In Human Embryos - Stage 9|1987 - Stage 9]] | [[Carnegie stage 9]]
[[1987 Developmental Stages In Human Embryos - Stage 9|1987 - Stage 9]] | [[Carnegie stage 9]]
{{Carnegie Collection stage 9 table}}


==Stage 10==
==Stage 10==
Line 226: Line 301:
{| class="wikitable"
{| class="wikitable"
|-
|-
! Serial No. !! Pairs of somites || Size (mm) || Grade !! Fixative !! Embedding Medium !! Plane || Thinness (µm) !! Stain  !! Year !! Notes
! Serial No. !! Pairs of somites || Size (mm) || Grade !! Fixative !! Embedding Medium || Thinness (µm) !! Stain  !! Year !! Notes
|-
|-
| 391 || 8 || E, 2 Ch., 14 || Good || Formol || P || 10 || Al. coch. || 1907 || Monograph by Dandy (1910)
| [[:Category:Carnegie Embryo 391|391]] || 8 || E, 2 Ch., 14 || Good || Formol || P || 10 || Al. coch. || 1907 || Monograph by Dandy (1910)
|-
|-
| 1201  || 7 || E,2  Ch.. 144 || Good || Formol || P || 8 || H. & or. G. || 1915 || Univ. Chicago No. H 87
| 1201  || 7 || E,2  Ch.. 144 || Good || Formol || P || 8 || H. & or. G. || 1915 || Univ. Chicago No. H 87
Line 234: Line 309:
| 2795  || 4-5 || E,2 || Poor || Alc. || P || 6 || Alcoch,or.G. || 1919 ||  
| 2795  || 4-5 || E,2 || Poor || Alc. || P || 6 || Alcoch,or.G. || 1919 ||  
|-
|-
| 3??0?? || 12 || E, 1 5 || Good || Formol || P  || 12.5 || I. H. || 1921 || Univ. Calif. No. H 19"7
| 3707 || 12 || E, 1 5 || Good || Formol || P  || 12.5 || I. H. || 1921 || Univ. Calif. No. H 197
|-
|-
| 3??09 || 4 || E. 1.4 Ch.. 14.8 || Poor || Formol || P || 10 || Erythrosin || 1921 || Univ. Chicago No H 279
| {{CE3709}} || 4 || E. 1.4 Ch.. 14.8 || Poor || Formol || P || 10 || Erythrosin || 1921 || Univ. Chicago No H 279
|-
|-
| 3710 || 12 || E., 3.6 Ch., 19.0 || Good || Formol || C-P || 10 || H. & or. G. || 1921 || Univ. Chicago No. H 392
| {{CE3710}} || 12 || E., 3.6 Ch., 19.0 || Good || Formol || C-P || 10 || H. & or. G. || 1921 || Univ. Chicago No. H 392
|-
|-
| 4216  || 8 || E, 2 Ch, 9.8 || Good || Formol || P || 15 || ? || 1923 || Monograph by Payne (1925)
| 4216  || 8 || E, 2 Ch, 9.8 || Good || Formol || P || 15 || ? || 1923 || Monograph by Payne (1925)
|-
|-
| 5074 || 10 || E., 3.3 Ch., 10.8 || Exc. || Bouin || P || 10 || Al. coch. || 1925 || Univ. Rochester No. H 10. Monograph by Corner (1929)
| {{CE5074}} || 10 || E., 3.3 Ch., 10.8 || Exc. || Bouin || P || 10 || Al. coch. || 1925 || Univ. Rochester No. H 10. Monograph by Corner (1929)
|-
|-
| [[:Category:Carnegie Embryo 6330|6330]] || 7 || E, 2.83 || Good || || P || 5 || Ehr. H. || 1931 || Univ. Chicago No. H 1404
| {{CE6330}} || 7 || E, 2.83 || Good || || P || 5 || Ehr. H. || 1931 || Univ. Chicago No. H 1404
|-
|-
| 6740  || 12 || E., 2.2 || Good || p || C-P || 8 ||  ? || 1933 || Litzenberg embryo. Studied by Boyden (1940)  
| 6740  || 12 || E., 2.2 || Good || p || C-P || 8 ||  ? || 1933 || Litzenberg embryo. Studied by Boyden (1940)  
|-
|-
| [[:Category:Carnegie Embryo 7251|7251]] || 8 || E., 1.27 || Good || Formol || C-P || 10 || {{HE}} || 1941 || "Singapore embryo." Univ. Cambridge No. H 98. Studied by Wilson (1914)
| {{CE7251}} || 8 || E., 1.27 || Good || Formol || C-P || 10 || {{HE}} || 1941 || "Singapore embryo." Univ. Cambridge No. H 98. Studied by Wilson (1914)
|-
|-
| 8244  || 6 || E., 1.55 Ch, 8,5 || Good || Alc. || C-P || 8 || {{HE}} phlox.|| 1944 ||
| 8244  || 6 || E., 1.55 Ch, 8,5 || Good || Alc. || C-P || 8 || {{HE}} phlox.|| 1944 ||
Line 256: Line 331:
|}
|}


[[1987 Developmental Stages In Human Embryos - Stage 10|1987 - Stage 9]] | [[Carnegie stage 10]]
[[1987 Developmental Stages In Human Embryos - Stage 10|1987 - Stage 10]] | [[Carnegie stage 10]]
 
{{Carnegie Collection stage 10 table}}


==Stage 11==
==Stage 11==


Serial Paired Size
{| class="wikitable"
No. somites (mm) Grade
|-
12 14 E, 2.1 Poor Ch, 13
! Serial No. !! Pairs of somites || Size (mm) || Grade !! Fixative !! Embedding Medium || Plane || Thinness (µm) !! Stain  !! Year !! Notes
164 18 E, 3.5 Good Ch, 14
|-
318 13/14 E, 2.5 Good Ch, 16
| {{CE12}} || 14 || E, 2.1 Ch, 13 || Poor || || P || Trans. || 10 || Al. carm. || 1893 ||
470 17 E, 4.3 Good Ch, 16
|-
Fixative Formol
| {{CE164}} || 18 || E, 3.5 Ch, 14 || Good || Formol || P || Trans. || 20 || Al. carm. || 1913 ||
Formol
|-
•>
| 318 || 13/14 || E, 2.5 Ch, 16 || Good || || P || Trans. || 25  || Al. carm. || 1905 ||
Thin- Embedding ness
|-
medium Plane P Trans.
| 470 || 17 || E, 4.3 Ch, 16 || Good || Formol || P || Trans. || 10  || Al. carm. || 1910 ||
P Trans. P Trans. P Trans. C Trans.
|-
779 14
| 779 || 14 || E, 2.75 || Good || || C || Trans. || 15 || Al. coch. || 1913 || Complete dysraphia. Studied by Dekaban and Bartelmez (1964)
E, 2.75 Good
|-
20 Al. coch. 1913 25 Al. coch. 1905 10 Al. coch. 1910 15 Al. coch.
| 1182b || || E, 3 Ch, 15x12x5 || Good  || Formol || ? || Trans. || 20 || Al. carm. || 1915 ||
20 Al. coch. 1915
|-
Ch, 16x14x12
| 2053 || 20 || E, 3.1 Ch, 12 || Exc. || Formol || P || Trans. || 10 || Al. coch.|| 1918 || Most advanced in group. Monograph by Davis (1923). Ag added to slide 2
1182b E, 3 Good
|-
1913 Complete dysraphia. Studied by Dekaban and Bartelmez (1964)
| 4315 || 17 || E, 4.7 Ch, 23x10.4X11 || Exc. || ? || C-P || Trans. || 10 || I.H. & E. || 1923 || Univ. Chicago No. 951. Studied by Wen (1928)
2053 20
|-
4315 17
| 4529 || 14 || E, 2.4 Ch, 21 || Exc. || Formol || P || Trans. || 10 || Al. coch, or. G. || 1924 || Monograph by Heuser (1930)
4529 14
|-
4783 13 4877 13
| 4783 || 13 || E, 2.3 || Fair || ? || ? || Trans. || 5 || I.H. || 1924 || Monograph by Wallin (1913)
5072 17
|-
Ch, 15x12x5
| 4877 || 13 || E, 2 Ch, 15 || Good || Formol || P || Trans. || 15 || Al. coch. || 1925
E, 3.1 Exc. Ch, 12
|-
E, 4.7 Exc. Ch, 23x10.4X11
| 5072 || 17 || E, 3 || Good || Formol || P || Trans. || 10 || {{HE}} || 1925 || {{Tubal}}. Type specimen. Monograph by Atwell (1930)
E, 2.4 Exc. Ch, 21
|-
E, 2.3 Fair E, 2 Good Ch, 15
| 6050 || 19/21 || E.,3 Ch, 10 || Good || Formol || C-P || Cor. || 10 || Al. coch. || 1930 || Advanced
E, 3 Good
|-
Formol
| {{CE6344}} || 13 || E, 2.5 Ch, 17 || Exc. || Formol || C-P || Trans || 6 || Al. coch. || 1931 || Least advanced in group
Formol P
|-
C-P Formol P
| {{CE6784}} || 17 || E, 5 Ch, 16 || Exc. || Formol || C-P || Trans || 6 || I.H, or. G. ||1933 ||
Formol P
|-
Formol P
| 7358 || 16 || E, ? Ch, 15 || Poor || Alc, formol || p || Oblique || 25 || {{HE}} || 1936 ||
Formol C-P
|-
Formol C-P
| 7611 || 16 || E., 2.4 Ch., 12 || Exc. || Bouin || C-P || Trans || 8 || {{HE}} || 1938 ||
Formol C-P
|-
Ale, p formol
| {{CE7665}} || 19  || E., 4.36 || Exc. || ? || C-P || Trans || 6 || || 1939 || Univ. Chicago No. H 1516
Bouin C-P
|-
C-P Formol C-P
| {{CE7702}} || 17 || E, 3.7 Ch., 14 || Good || Formol || C-P || Trans || 10 || Al. coch. || 1940 Returned to B M Patten
Formol C-P Bouin C-P
|-
Trans.
| 7851 || 13 || E., 4.3 Ch, 18 || Exc. || Formol || C-P || Trans || 8 || {{HE}} || 1940 || Slightly injured
Trans.
|-
Trans.
| {{CE8005}} || 16/17  || E, 3 || Exc. || Bouin || C-P || Trans || 8 || {{HE}} || 1942 || {{Tubal}}.
Trans.
|-
Trans. Trans.
| 8116 || 17 || E, 14 Ch.. 17 || Good || Formol || p || Sag. || 8 || Azan || 1953 ||
Trans.
|-
Cor.
| 8962 || 15 || E, 1.55 || Good || ? || * || Sag. || ? || ? || 1952 || {{Tubal}}. I'ntv Chicago No H 810
Trans.
|}
Trans.
{{Carnegie Collection stage 11 table}}
Oblique
Trans.
Trans. Trans
Trans.
10 Al. coch.
10 I.H. & E.
10 Al. coch, or. G.
1918 Most advanced in group. Monograph by Davis (1923). Ag added to slide 2
1923 Univ. Chicago No. 951. Studied by Wen
(1928)
1924 Monograph by Heuser (1930)
6050
6344
6784
7358
7611
7665 7702
7851
8005 8116
19/21 E.,3 Good Ch, 10
10 H.&E. 10 Al. coch. 6 Al. coch.
1925 Tubal. Type specimen. Monograph by Atwell (1930)
1930 Advanced
8962
Formol
?*Sag, 1952
Tubal. I'ntv Chicago No H 810
13
17
16
16
19 17
13
16/1"7 17
15
E, 2.5 Exc. Ch, 17
E, 5 Exc. Ch, 16
E, ? Poor Ch, 15
E., 2.4 Exc. Ch., 12
E., 4,36 Exc. E, 3.7 Good Ch., 14
E., 4.3 Exc. Ch, 18
E, 3 Exc. E, 14 Good Ch.. 17
E, 1 55 GIKXJ
1931 Least advanced in group 6 I.H, or. G. 1933
 
Trans
p Sag 8
1942 Tuba! Azan 1953
(u-m) Stain
10 Al. carm. 1893
5 I.H.
15 Al. coch. 1925
25 H.&E. 1936 8 H.&E. 1938
6 >
10 Al. coch.
8 H.&E. 8 H.&E.
1939 Univ. Chicago No. H 1516 1940 Returned to B M Patten
1940 Slightly injured
Year Notes
1924 Monograph by Wallin (1913)
 


[[1987 Developmental Stages In Human Embryos - Stage 11|1987 - Stage 11]] | [[Carnegie stage 11]]
[[1987 Developmental Stages In Human Embryos - Stage 11|1987 - Stage 11]] | [[Carnegie stage 11]]


==Stage 12==
==Stage 12==
{| class="wikitable"
|-
! Serial No. !! Pairs of somites || Size (mm) || Grade !! Fixative !! Embedding Medium || Plane || Thinness (µm) !! Stain  !! Year !! Notes
|-
| 209  || ca_24  || EH3  Ch.,15 || Poor  || Alc  ||  P  || Cor. || 50  || Al. coch.  || 1902  ||
|-
| 250  || 19?  || E , 2 (11, 10x9x9  || Poor  || p ||  ? || Sag. || 20  || Al. coch.  || p  ||
|-
| 384  || P  || E 2_5  Ch.,13 || Poor  || Formol  || P  || Trans.  || 10  || H.&E.  || 1907  || Macerated. Narrow yolk stalk
|-
| {{CE486}}  || 21  || E.,4  Ch., 22 || Good  || Corros. acetic  || P  || Trans.  || 10  || Al. Coch.  || 1911  ||
|-
| 1062  || 29  || E.,4.5  Ch., 20|| Good  || Formol  || P  || Trans.  || 20  || Al. coch.  || 1915  || Transitional to next stage
|-
| 2197  || ?  ||  E_,5_3 Ch., 19.5 || Poor || Formol ||  P  || Trans.  || 10  || Al. coch, or. G.  || 1918  ||
|-
| 4245-7  || ca.24  || E.,3.5  Ch., 24|| Good  || Alc, formol  || P  || Trans.  || 10  || Al. coch.  || 1923  || Caudal neuropore widely open
|-
| 4479  || P  || E.,5 .8 Ch , 17 || Poor  || Formol  || P  || Trans.  || 40  || Al. coch.  || 1923  || Macerated. Upper lirnb buds not visible
|-
| 4736  || 26  || E.,3.0  Ch.,20|| Good  || Formol  || P  || Cor.  || 10  || Al. coch.  || 1924  || No upper limb buds. Caudal neuropore closed
|-
| 4759  || ? ||  E.,4.5 Ch.,15 || Good  || Formol  || P  || Trans.  || 15  || H.&E.  || 1924  || Neural tube folded
|-
| 4784  || 23  || E_,3  || Good  || P  || P  || Trans.  || 10  || p  || 1924  ||
|-
| 5035  || 25-28  || E.,3.8  Ch.,18 || Good  || Formol  || C-P  || Trans.  || 10  || Al. coch.  || 1925
|-
| 5048  || ca_25  || E_,3_5  || Good  || Formol  || C-P  || Trans.  || 10  || Al. coch.  || 1925  || {{Tubal}}. Injured
|-
| 5056  || 25  || E,,3 Ch.,12  || Good  || Formol  || P  || Trans.  || 10  || Al. coch.  || 1925  ||
|-
| 5206  || ?  || E.,4  Ch., 51x31x30 || Poor  || ?? || P  || Trans.  || 20  || Al. coch.  || 1926  || {{Tubal}}
|-
| 5300 || ? || E., 4.5 Ch,16.5 || Poor || Formol  || P  || Trans.  || 20  || Al. coch.  || 1926  || Autopsy. Partly macerated
|-
| 5923  || 28 || E.,4 Ch.,15 || Exc. || Formol  || P  || Trans.  || 10 || Al. coch.  || 1929  ||
|-
| 6097  || 25 || E,3.4 Ch., 12.5 || Exc.  || Formol  ||  C-P  || Trans.  || 10  || Al. coch, eosin  || 1930  || {{Tubal}}. Ag added to slides 1-3
|-
| 6144  || 27 || E. 3.3 Ch.,11 || Good  || Lysol—Zenker  || C—P  || Trans.  || 10  || Al. coch.  || 1930  ||
|-
| {{CE6488}}  || 28 || E, 32 Ch,22 || Good  || Formol  || C—P  || Trans.  || 10 || Al. coch. || 1932 ||
|-
| 6937  || 26 || E.,3 Ch , 12 || Poor  || Formol  || C—P  || Cor.  || 10 || I.H.,or.G.  || 1934  || {{Tubal}}. Caudal neuropore closed
|-
| 7724  || ca.29 || E,3.5 Ch.,18 || Good || Formol  || C—P  || Sag.  || 8  || H.&E.  || 1940  || Caudal end broken
|-
| 7852  || 25 || E , 3.7 Ch,26 || Exc. || Formol  || C—P  || Trans.  ||  10  ||  H.&E.  ||  1940  || Typical for stage 12
|-
| 7999  || ca.28 || E,3.2  Ch , 15 || Exc. || Bruin  || C-P  || Trans.  || 10  || H.&E.  || 1942  || Caudal defect
|-
| 8505a  || 24 || Ch, 23.5 || Exc. || Formol  || C-P  || Trans.  || P  || H. Phlox. || 1947 ||
|-
| 8505b || 23  || Ch,24 || Exc. || Formol  || C-P  || Sag. || p  || Azan || 1947  || Twins
|-
| 8941  || 28  || E,4.9  Ch, 35 || Exc.  || Zenker  || C-P || Trans. || 6 I.H.  || 1927 || Univ. Chicago No. H 1261
|-
| 8942 || 25  || E, 38 Ch, 35 || Exc. || Formal-Zenker  || C-P || Cor.  || 5 11-1.  || 1930 || Univ. Chicago No. H 1382
|-
| 8943 || 22  ||  E. 3.9 Ch, 20.4 || Exc.  || Formal-Zenker  ||  C-P  || Trans.  || 8  || H.&E. || 1934 || Univ. Chicago No. H 1481
|-
| 8944  || 25  || E,4  Ch,,25 || Exc.  || Formal-Zenker  || C-P  || Sag.  || 8  || I.H.  || 1936  || Univ. Chicago No. H 1514
|-
| [[:Category:Carnegie Embryo 8963|8963]]  || 22  ||  E, 3.8 Ch , 14.5 ||  Fair || Formol || C-P  || Trans || 10 || I.H. || 1928  || Univ. Chicago. No. H 1093 Studied by Wen (1928)<ref name=Wen1928>{{Ref-Wen1928}}</ref>
|-
| [[:Category:Carnegie Embryo 8964|8964]]  || 23 || E,2.8 Ch - 25 || Poor  || Formol  || p  || Trans  || 8  || I.H.  || 1928  || Univ. Chicago No. H984  Studied by Wen (1928)<ref name=Wen1928>{{Ref-Wen1928}}</ref>
|-
| 9154  || 24  || E, 5 4  || Exc  || Formal  || C-P  || Trans  || I.H.  & phlox.  || 1953 ||
|}


Thin- Serial Paired Size Embedding ness
{{Carnegie Collection stage 12 table}}
No. somites (mm) Grade Fixative medium Plane (|im) Stain Year
Notes
209 ca.24 E.,3 Ch.,15
Poor Ale.
Poor p
Poor Formol
Good Corros. acetic Good Formol
Poor Formol Good Ale, formol Poor Formol
P Cor. 50
? Sag. 20
P Trans. 10
P Trans. 10
P Trans. 20
P Trans. 10
P Trans. 10
P Trans. 40
P Cor. 10
P Trans. 15
P Trans. 10 C-P Trans. 10
Al. coch. 1902 Al. coch. p
250 19? 384 P 486 21
E, 2
Ch., 10x9x9 E., 2.5
Ch.,13
E.,4
Ch., 22
E.,4.5
Ch., 20
E., 5.3
Ch., 19.5
H.&E.
Al. coch.
Al. coch.
Al. coch, or. G.
Al. coch.
Al. coch.
1907 Macerated. Narrow yolk stalk 1911
1062 29
2197 •>
4245-7 ca.24 E.,3.5
1915 1918 1923 1923
Ch., 24 4479 E., 5.8
C h , 17
4736 26 E.,3.0 Good Formol
Al. coch. 1924
4759
4784 5035
Ch.,20 7 E.,4.5
Ch., 15 23 E.,3
25-28 E.,3.8 Ch., 18
Good Formol
Good p Good Formol
H.&E.
5048 ca.25 E.,3.5 Good Formol C-P Trans. 10
Al. coch. 1925
Tubal. Injured
Tubal
Autopsy. Partly macerated
Tubal. Ag added to slides 1-3
Tubal. Caudal neuropore closed Caudal end broken
Typical for stage 12
Caudal defect
5056 5206 5300 5923 6097 6144 6488 6937
7724 7852 7999 8505a
25 E.,3 Good Formol Ch.,12
Trans. 10 Trans. 20 Trans. 20
C-P Trans. 10 Trans. 10 Trans. 10 Cor. 10 Sag. 8 Trans. 10 C-P Trans. 10
Al. Coch.
Al. coch.
Al. coch.
Al. coch.
Al. coch, eosin Al. coch.
Al. coch.
I. H., or. G.
H.&E.
H.&E.
H.&E.
H. Phlox. Azan
1925 1926 1926 1929 1930 1930 1932 1934 1940 1940 1942
b 23
8941 28
8942 25
8943 22
8944 25
8963 22
8964 23
9154 24
Exc Formol C-P Exc Zenker C-P
Trans. 6 Cor. 5 Trans. 8
I.H. 1927 I.H. 1930 H.&E. 1934 I.H. 1936 I.H. 1928 I.H. 1928 I.H. & phlox
Univ. Chicago No. H 1261
Univ. Chicago No. H 1382
Univ. Chicago No. H 1481
Univ. Chicago No. H 1514
Univ. Chicago. No. H 1093 Studied by Wen (1928)
Univ. Chicago No. H 984. Studied by Wen (1928)
p
p 28 25 27 28 26 ca. 29 25 ca.28 24
E.,4 Poor p Ch., 51x31x30
7
P
Exc. Formol P Trans. 10
Poor Formol
E., 4.5 Ch,16.5 E.,4 Ch.,15 E,3.4 Ch., 12.5 E. 3.3 Ch., 11 E, 3.2 Ch,22 E.,3
C h , 12 E, 3.5 Ch.,18 E , 3.7 Ch,26 E, 3.2
C h , 15 Ch, 23.5 Ch,24
E, 4.9
Ch, 35
E, 38
Ch, 35
E. 3.9
Ch,, 20,4
E,4 Exc. Formal- C-P Sag. 8 Ch,,25 Zenker
E, 3.8 Fair Formol C-P Trans. 10 Ch , 14 5
E,2.8 Pix>r Formol p Trans 8 Ch . 26 "
E, 5 4 Exc Formal C-P Trans 8&6
Exc. Formol
Good Lysol-Zenker C-P
Good Formol C-P
Poor Formol C-P
Good Formol C-P
Exc. Formol C-P
Exc. Bouin
Exc Formol C-P
Trans. p Sag. p
\ 1 CiA~J
( 1947 Twins
Exc Zenker C-P
Exc, Formol- C-P Zenker
P
Transitional to next stage
Caudal neuropore widely open
Macerated. Upper limb buds not visible
No upper limb buds. Caudal neuropore closed
1924 Neural tube folded Al. coch. 1925
p 1924
1953
 


[[1987 Developmental Stages In Human Embryos - Stage 12|1987 - Stage 12]] | [[Carnegie stage 12]]
[[1987 Developmental Stages In Human Embryos - Stage 12|1987 - Stage 12]] | [[Carnegie stage 12]]


==Stage 13==
==Stage 13==
{| class="wikitable"
|-
! colspan=10| [[Carnegie Collection|Carnegie Collection Embryos]]  - [[Carnegie stage 13|Stage 13]]&nbsp;
|-
! Serial No. !! Size (mm) || Grade !! Fixative !! Embedding Medium || Plane || Thinness (µm) !! Stain  !! Year !! Notes
|-
| {{CE1}} || E.,4.5 Ch., 30x30 || Poor || Salicylic acid || P || {{Transverse}} || 10 || Hemat. || 1887 || Obtained by Mall while student
|-
| {{CE19}} || E., 5.5 Ch., 18x14 || Poor || p || ? || {{Transverse}} || 20 || Al. coch. || 1895 ||
|-
| {{CE87}} || E., 4 Ch., 24x16x9 || Poor || p || P || {{Transverse}} || 20 || Al. coch. || 1896 ||
|-
| {{CE76}} || E., 4.5 Ch., 22x20 || Poor || Alc. || P || {{Transverse}} || 20 || Al. coch. || 1897 ||
|-
| {{CE112}} || E., 4 || Poor || p || P || {{Sagittal}} || 10 || Al. coch. || p ||
|-
| {{CE116}} || E., 5 || Poor || p || ? || {{Sagittal}} || 10 || Al. coch. || 1898 ||
|-
| {{CE148}} || E.,4.3 Ch., 17x14x10 || Poor || Alc. || P || {{Coronal}} || 10 || {{HE}} || 1899 || Abnormal. Nasal discs fused
|-
| {{CE186}} || E.,3.5 Ch., 25x20x15 || Poor || Alc. || P || {{Transverse}} || 20 || Al. coch. || 1901 ||
|-
| {{CE239}} || E., 3.0 || Poor || Formol || P || {{Transverse}} || 10 || {{HE}} || 1903 ||
|-
| {{CE248}} || E., 4.5 Ch., 30x23x15 || Poor || p ||  ? || {{Coronal}} || 50 || Al. coch. || 1904 ||
|-
| {{CE407}} || E.,4 Ch., 14x13X7 || Poor || Formol ||  ? || {{Transverse}} || 40 || Al. coch. || 1907 ||
|-
| {{CE463}} || E., 3.9 Ch., 17x12x7 || Good || Formol || P || {{Coronal}} || 10 || Al. coch. || 1910 ||
|-
| {{CE523}} || E., 5 Ch., 25x25x15 || Fair || Formol || P || {{Transverse}} || p || Al. coch. || 1911 ||
|-
| {{CE588}} || E., 4.0 Ch., 19x15x8  || Good || Corros. acetic || P || {{Coronal}} || 15 || {{HE}} || 1912 || Advanced
|-
| {{CE786}} || E., 4.5 Ch., 19x10x10 || Poor || Alc. || P || {{Sagittal}} || 15 || Al. coch. || 1913 ||
|-
| {{CE800}} || E., 6.0 || Good || Corros. acetic || P || {{Transverse}} || 10 || H || 1913 || Curettage. Anencephaly
|-
| {{CE808}} || E.,4.0 || Poor || Corros. acetic || P || {{Transverse}} || 15 || Al. coch. || 1914 || {{Tubal}} Incomplete
|-
| {{CE826}} || E., 5.0 Ch., 13x13x9 || Good || Formol || P || {{Transverse}} || 20 || Al. coch. || 1914 || Shrunken
|-
| {{CE836}} || E.,4.0 Ch., 22x18x11 || Exc.|| Corros. acetic || P || {{Transverse}} || 15 || Al. coch. || 1914 || Less advanced
|-
| {{CE963}} || E.,4.0 Ch., 23x18x16 || Good || Formol || P ||  {{Coronal}} || 20 || Al. coch. || 1914 ||
|-
| {{CE1075}} || E.,6.0 Ch., 46x32x20 || Exc.|| Corros. acetic || P ||  {{Coronal}} || 20 || {{HE}} or. G. || 1915 || Most advanced in group
|-
| {{CE3956}} || E., 4.0  || Poor || Formol || P || {{Transverse}} || 20 || Al. coch. || 1922 || {{Tubal}} Incomplete
|-
| {{CE4046}} || E.,5 Ch., 22x20x20  || Poor || Formol || P || {{Transverse}} || 50 || Al. coch. || 1922 ||
|-
| {{CE5541}} || E., 6.0 Ch., 35x30x20 || Good || Formol || P || {{Transverse}} || 10 || Al. coch., eosin || 1927 ||
|-
| {{CE5682}} || E., 5.3 Ch., 29x25x13  || Poor || Formol || P || {{Coronal}} || 20 || Al. coch. || 1928 ||
|-
| {{CE5874}} || E., 4.8  || Exc.|| {{Bouin}} || P || {{Transverse}} || 10 || {{HE}} || 1929 || Hysterotomy. Bromides only
|-
| {{CE6032}} || E., 5.8 Ch., 30x24x13  || Poor || Formol || P || P || ? || p || 1929 || Not good enough to cut
|-
| {{CE6469}} || E., 5.0 Ch., 25x18x18 || Poor || Formol || P || P || P || P || 1932 || Fragmented on cutting. Not saved
|-
| {{CE6473}} || E., 5.0 Ch, 30x30x15  ||  Exc. || Formol || C-P ||  {{Coronal}} || 6 || Al. coch. || 1932 || Less advanced. Ag added
|-
| {{CE7433}} || E., 5.2 Ch., 15x13x13  ||  Exc. || Formol || C-P ||  {{Coronal}} || 8 || {{HE}} || 1937 || {{Tubal}}
|-
| {{CE7618}} || E, 48 Ch, 18x15x15  ||  Exc. || {{Bouin}} || C-P ||  {{Coronal}} || 10 || {{HE}} || 1939 || Hystereaomy. Advanced. Ag added
|-
| {{CE7669}} || E, 5.0 Ch., 23x16x14 || Good || Formol || C-P ||  {{Coronal}} || 6 || {{HE}} || 1939 || Hysterectomy. Least advanced in group, Ag added
|-
| {{CE7889}} || E, 4.2  ||  Exc. || {{Bouin}} || C-P ||  {{Coronal}} || 6 || {{HE}} || 1941 || Hysterectomy
|-
| {{CE8066}} || E,53 C h , 20x18xI8 ||  Exc. || {{Bouin}} || C-P || {{Transverse}} || 8 || {{HE}} || 1942 || Hysterectomy. Ag added to slide 2
|-
| {{CE8119}} || E., 5.3 Ch., 32x28x6.5  ||  Exc. || {{Bouin}} || C-P || {{Transverse}} || 8 || {{HE}} || 1943 || Hysterectomy
|-
| {{CE8147}} || E., 5.2 Ch., 27x21x19 || Poor || Formol || ? || ? || p ||  p || 1943 || {{Tubal}} Not cut
|-
| {{CE8239}} || E., 4.3 ||  Exc. || {{Bouin}} || C-P || {{Sagittal}} || 8 || H. phlox. || 1944 ||
|-
| {{CE8372}} || E., 5.6 ||  Exc. || Alc.& {{Bouin}} || P || {{Transverse}} || 10 || Azan || 1946 ||
|-
| {{CE8581}} || E., 4.8 ||  Good || Kaiserling || C-P || {{Sagittal}} || 8 || Azan || 1948 || Most-advanced third
|-
| {{CE8967}} || E., 5.7 ||  Exc. || Acetic Zenker  || C-P || {{Transverse}} || 6 || {{HE}} || 1931 || Head injured. Univ. Chicago No. H1426
|-
| {{CE9296}} || E,4.5 ||  Exc. || C-P || {{Coronal}} || 8 || Azan || 1955 ||
|-
| {{CE9297}} || E., 4.5 ||  Exc. || C-P || {{Sagittal}} || 8 || Azan || 1955 ||
|-
| {{CE9697}} || E., 5.5 || Bouin || 1956 || not cut
|-
|}


Serial Size Embedding
{{Carnegie Collection stage 13 table}}
No. (mm) Grade Fixative medium Plane
Thin- ness
(|xm) Stain Year
Notes
Obtained by Mall while student
Abnormal. Nasal discs fused
1 E.,4.5
Ch., 30X30
19 E., 5.5
Ch., 18X14
87 E., 4
Ch., 24X16x9
76 E., 4.5 Ch.,22X20
112 E., 4 116 E., 5 148 E.,4.3
Ch., 17x14x10 186 E.,3.5
Ch., 25X20X15 239 E., 3.0
248 E., 4.5
Ch., 30x23x15
407 E.,4
Ch., 14x13X7
463 E., 3.9
Ch., 17x12x7
523 E., 5
Ch., 25X25X15
588 E., 4.0
Ch., 19x15x8
786 E., 4.5
Ch., 19X10X10
800 E., 6.0 808 E.,4.0 826 E., 5.0
Ch., 13X13X9 836 E.,4.0
Ch., 22X18X11 963 E.,4.0
Ch., 23X18X16 1075 E.,6.0
Ch., 46x32x20 3956 E., 4.0
4046 E.,5
Ch., 22X20X20
5541 E., 6.0
Ch., 35x30x20
5682 E., 5.3
Ch., 29x25x13
5874 E., 4.8 6032 E., 5.8
Ch., 30x24x13 6469 E., 5.0
Ch., 25x18X18 6473 E., 5.0
Ch, 30X30X15 7433 E., 5.2
Ch., 15 x 1 3 x 1 3 "618 E,48
Ch, 18x15x15 "669 E,5.0
Ch., 23xl6x 14 "'889 E, 4.2
8066 E,53
C h , 20 x 18 x IS
Poor Salicylic acid Poor p Poor p Poor Ale.
P Trans. ? Trans.
10 20 20 20 10
p 10
20
10 50
40
10
p
15
15
10 15 20
15
20
20
20 50
10 20 10
? p 6
8 10 6
6 8
Hemat. 1887
Al. coch. 1895
Al. coch. 1896
Al. coch. 1897
Al. coch. p Al. coch. 1898 H.&E. 1899
Al. coch. 1901
H.&E. 1903 Al. coch. 1904
Al. coch. 1907
Al. coch. 1910
Al. coch. 1911
H.&E. 1912
Al. coch. 1913
H. 1913 Al. coch. 1914 Al. coch. 1914
Al. coch. 1914
Al. coch. 1914
H.&E., or. G. 1915
Al. coch. 1922 Al. coch. 1922
Al. coch., eosin 1927
Al. coch. 1928
H.&E. 1929 p 1929
p 1932
Al. coch. 1932
H.&E. 1937
H.&E. 1939
H.&E. 1939
H.&E 1941 H.&E 1942
Poor p Poor p Poor AJc.
Poor Ale.
Poor Formol Poor p
Poor Formol
Good Formol
Fair Formol
Good Corros.
Poor Ale.
Good Corros. Poor Corros. Good Formol
Exc. Corros.
Good Formol
Exc. Corros.
Poor Formol Poor Formol
Good Formol Poor Formol
Exc. Bouin Poor Formol
Poor Formol
Exc. Formol
Exc Formol
Exc. Bouin
Good Formol
Exc. Bouin Exc. Bouin
acetic
acetic acetic
acetic
acetic
p P
p
? P
P P
?
?
P p
P
P
P P P
P
P
P
Trans.
Trans.
Sag. Sag. Cor.
Trans.
Trans. Cor.
Trans.
Cor.
Trans.
Cor.
Sag.
Trans. Trans. Trans.
Trans.
Cor.
Cor.
Trans. Trans.
Trans. Cor. Trans.
p
p
Cor.
Cor.
Cor.
Cor.
Cor. Trans.
Advanced
Curettage. Anencephaly Tubal. Incomplete Shrunken
Less advanced
Most advanced in group Tubal. Incomplete
Hysterotomy. Bromides only Not good enough to cut
Fragmented on cutting. Not saved
Less advanced. Ag added
Tubal
Hystereaomy. Advanced. Ag added
Hysterectomy. Least advanced in group, Ag added
Hysterectomy
Hysterectomy. Ag added to slide 2
P P
P P P
OP
C-P
C-P
C-P
C-P C-P
p
p
Serial Size No. (mm)
8119 E., 5.3
Ch., 32x28x6.5
8147 E., 5.2
Ch., 27X21X19
8239 E., 4.3 8372 E., 5.6 8581 E., 4.8 8967 E., 5.7
9296 E,4.5
9297 E., 4.5
9697 E., 5.5
Grade Fixative
Exc. Bouin
Poor Formol
Exc. Bouin
Exc. AJc. & Bouin Good Kaiserling Exc. Acetic Zenker
Embedding medium
C-P ?
C-P P C-P C-P
C-P
Thin- ness Plane (|xm)
Trans. 8
?p
Sag. 8 Trans. 10 Sag. 8 Trans. 6
Cor. 8
Stain Year
H.&E. 1943
p 1943
H. phlox. 1944 Azan 1946 Azan 1948 H.&E. 1931
Azan 1955
Notes Hysterectomy
Tubal. Not cut
Most-advanced third
Head injured. Univ. Chicago No. H1426
Not cut
Exc. •> Exc. •>
STAGE 13 (continued)
Sag. 8
Bouin 1956
C-P
Azan 1955


==Stage 14==
==Stage 14==


{| class="wikitable"
|-
! Serial No. !! Size (mm) || Grade !! Fixative !! Embedding Medium || Plane || Thinness (µm) !! Stain  !! Year !! Notes
|-
| 4 || E.,7 || Poor || p || P || Trans. || 10 || Al. coch. || 1892 ||
|-
| 18 || E.,7 Ch., 18x18 || Poor || p  || P || Trans. || 20 ||  Al. coch. || 1895 ||
|-
| 80 || E., 5.0 Ch., 24x18x8 || Good || Alc. || P  || Trans. || 20 ||  Al. coch. || 1897 ||
|-
| 187 || E.,7 Ch., 35x30x25 || Poor || ? || P || Sag. || 20 || Al. coch. || 1902 ||
|-
| 208 || E.,7 Ch., 22x11Xx1 || Poor || ? || P || Sag. || 20 || Al. coch. || 1902 ||
|-
| 245 || E.,6 Ch., 13x12x10 || Poor || Formol, Zenker || ? || Trans. || 5 || {{HE}} || 1904 ||
|-
| 372  || E.,7 || Fair || p || P || Trans. || 10 || H.-Congo red || 1902 ||
|-
| 380 || E,6 Ch., 20x20x14  || Poor || p || P || Sag. || 20 || {{HE}} || 1906 ||
|-
| 387  || E.,7 Ch., 45x40x50 || Good || Formol || P || Trans. || 20 || {{HE}} || 1907 ||
|-
| 442  || E.,6 Ch., 25x20  || Poor || Formol || P || Cor.? || 50 || Al. coch. || 1908 ||
|-
| 552  || E.,6 Ch, 40x28Xx8 || Poor  || p || P || Sag. || 40 || Al. coch. || 1911 || Possible anencephaly
|-
| 560  || E., 7.0 Ch, 24x24 || Poor || Formol || P || Cor. || 40 ||  Al. coch. || 1912 ||
|-
|  [[:Category:Carnegie Embryo 676|676]]  || E., 6.0 Ch, 35x20x17  || Good || Carnoy || P || Tr.-Cor. || 20 || {{HE}} || 1913 || Possible spina bifida
|-
| 873  || E,6.0 Ch., 35x28x16  || Poor || Formol ||  P || Sag. || 20 || Al. coch. ||  1914 ||
|-
| 988 || E,6.0 Ch., 38x30x23  || Good || Formol-corros. acetic || P || Trans. || 20 || Al. coch. ||  1914 ||
|-
| [[:Category:Carnegie Embryo 1380|1380]] || E , 5.7 Ch, 36x24x24 || Exc. || Formol ||  P || Cor. || 20 || Al. coch. || 1916 ||
|-
|  [[:Category:Carnegie Embryo 1620|1620]] || E, 6.6 Ch, 35x30x8 || Good || Formol || P || Sag. || 20 || Al. coch. ||  1916 ||
|-
| ?? || E, 6.68 || Fair || ? || ? || Trans. || 6 || Al. coch., or. G || 1919 ||
|-
| 2841  || E , sy Ch. 35x21 || Good || Alc. || P || Trans. || 20 || {{HE}} or.G || 1920 ||
|-
| 3360 || E.6.0 || Good || Formol || C || Trans. || 20 || {{HE}} or.G || 1920 || In mvomatous uterus. Advanced.
|-
| 3805  || E., 5.9  || Exc. || {{Bouin}} || P || Trans. || 15 || {{HE}} || 1921 || Evans embryo No. 168. Serial bromides only
|-
| 3960 ||  E., 5.5  || Good || Formol || C-P || Cor. || 20 ||  Al. coch. ||  1922 || Blood vessels naturally injected
|-
|  [[:Category:Carnegie Embryo 4154|4154]]  || E, 6.8  Ch., 33x31x20 || Poor || Alc. || C-P || Trans. || 8 || {{HE}} || 1923 ||
|-
| 4245-6  || E., 7.0 || Good || Formol || P || Trans. || 15 || Al. coch. ||  1923 || Univ. Pennsylvania No. 40. Ag added
|-
|  [[:Category:Carnegie Embryo 4629|4629]]  || E., 6.5 Ch.,32x23 || Good || Formol || C-P || Sag. || 10 || {{HE}} || 1924 ||
|-
| 4672 ||  E,8.2 Ch., 40X34X25 || Good || Formol || P || Trans. || 20 || Al. coch. || 1924 || Advanced
|-
| 4805  || E., 7.3 Ch., 15X8X9 || Good || Formol || C-P || Trans. || 10 || {{HE}} || 1924 || {{Tubal}}
|-
| 5437  || E., 7.0  || Good  || Formol || C-P || Trans. || 8 || {{HE}} || 1927 || Advanced
|-
|  [[:Category:Carnegie Embryo 5654|5654]] ||  E., 5.0 Ch., 30X23X17 || Good || Formol || P || Trans. || 10 || Al. coch., eosin || 1928 || Less advanced
|-
| 5787  || E., 6.8 Ch., 32x30x23  || Good || Formol || P || Sag. || 10 || Al. coch., eosin || 1928 ||
|-
| 6428  || E., 7.0 Ch., 30X28X25  || Good  || Formol || C-P || Cor. || 6, 10 || Al. coch. || 1931  || Advanced
|-
| 6500 ||  E, 4.9*  || Good || Souza? || C-P || Sag. || 10 || Al. coch. || 1931 || E. Leitz, Berlin
|-
|  [[:Category:Carnegie Embryo 6502|6502]]  || E., 6.7*  || Exc. || Souza? || C-P || Trans. || 5, 10 || {{HE}} || 1931 || E. Leitz, Berlin. Ag added to slides 1-25
|-
| 6503  || E., 6.3*  || Exc. || Souza? || C-P || Cor. || 10 || Al. coch. || 1931 || E. Leitz, Berlin
|-
| 6739  || E.,8  || Poor || Formol || C-P || Sag. || 20 ||  {{HE}} || 1933 ||
|-
|  [[:Category:Carnegie Embryo 6830|6830]]  || E,5.5 Ch., 47X23X15  || Exc. || Formol || C-P || Cor. || 8 ||  {{HE}} || 1933 ||
|-
| 6848 || E., 7.8  || Good || Formol || C-P || Cor. || 10 ||  {{HE}} || 1934 || {{Tubal}}
|-
| 7324  || E, 6.6 Ch., 17x13x10 || Good || Formol || C-P || Trans. || 8 || {{HE}} || 1936 || Low implantation
|-
|  [[:Category:Carnegie Embryo 7333|7333]]  || E, 6.3 || Good || Formol || C-P || Trans. || 8 ||  {{HE}} || 1936 ||
|-
| 7394  || E, 7.2 Ch., 45X20X20 ||  Exc.  || Formol || C-P || Trans. || 8 ||  {{HE}} || 1937 ||
|-
|  [[:Category:Carnegie Embryo 7400|7400]]  || E, 6.3 Ch., 35X25x20 || Good  || Formol || C-P || Cor. || 10 ||  {{HE}} || 1937 ||
|-
| 7522  || E., 7.7 Ch., 33x16x16 ||  Good || Formol || C-P || Trans. || 8 ||  {{HE}} || 1938 || Natural blood injection
|-
| 7598  || E., 7.0  Ch., 30x30x25 || Poor || Alc. || C-P || Trans. || 10 || {{HE}} || 1938 || Macerated
|-
| 7667  || E., 5 Ch., 16x14x12  || Fair || Formol || P || Trans. || 8 || {{HE}}, phlox. || 1939 ||
|-
| 7829 || E., 7.0  || Exc. || Bouin || C-P || Trans. || 8 ||  {{HE}} || 1940 || Advanced
|-
| 7870 || E,7.2 Ch., 25x20x13  || Exc. || Bouin || C-P || Trans. || 8 ||  {{HE}} || 1941 || On borderline of next stage. Ag added
|-
| 8141 || E,7.3 Ch.,33x28 || Exc. || C-P || Cor. || 8 ||  {{HE}} || 1943 || Shrinkage cracks in brain
|-
| 8306 || E.5.3 Ch., 27 || Exc. || Bouin || C-P || Trans. || 10, 20 || {{HE}}, phlox. || 1945 ||
|-
| 8308 || E, 5.85 Ch., 27x18x18 || Exc. || Formol & Bouin || C-P || Sag. || 8 || Azan || 1945 ||
|-
| 8314 || E,8 Ch.,23x22 || Exc. || Formol || C-P || Trans. || 8 || Azan || 1945 ||
|-
| 8357 || E., 6.5 || Good || Formol || C-P  || Sag. || 8 || Azan || 1946 ||
|-
| 8552 || E,6.5 || Exc. || Alc. & Bouin || C-P  || Trans. || 8 || Azan || 1947 ||
|-
| 8999 || E,6 Ch.,16x15||  Exc. || Alc. & Bouin || C-P  || Sag. || 8 || Azan || 1952 ||
|-
| 9695 || E,8.5 || colspan="6" | ? || 1955 || Not cut
|}
{{Carnegie Collection stage 14 table}}
==Stage 15==
{| class="wikitable"
|-
! Serial No. !! Size (mm) !! Grade !! Fixative !! Embedding Medium !! Plane !! Thinness (µm) !! Stain  !! Year !! Notes
|-
| [[:Category:Carnegy Embryo 2|'''2''']]  ||  E., 7.0 Ch., 25X25X25  ||  Good || Alc. || P || Trans. || 15 || Al. carm. || 1888 || Least-advanced third
|-
| 88  ||  E.,8 Ch., 30x28x15 || Poor || Alc. || P || Cor. || P || Al. coch. || 1897 ||
|-
| 113  ||  E.,8 241 E,6.0 || Poor || P || p || Sag. || 10 || Borax carmine || ? ||
|-
| 241 || E,6.0 || Good || Formol || P || Trans. || 10 || H. & Congo red || 1904 ||
|-
| 371 ||  E,6.6 || Good || Formol || P || Sag. || 10 || Al. coch. || 1913 || Shrunken and cracked
|-
| 389 ||  E., 9 || Poor || p || p || Sag. || 20 || {{HE}} || 1907 || {{Tubal}}
|-
| 721 ||  E., 9.0 Ch., 30x20x10 ||  Exc. || Zenker formol || P || Trans. || 15 || {{HE}} || 1913 || Median in group
|-
| 810 || E., 7.0 Ch, 30x25x15 || Good || Alc. || P || Sag. || 20 ||  Al. coch || 1913 ||
|-
| 855 || E.,7.5 ||  Poor ||  Formol || P || Trans. || 100 || Al. coch. || 1914 || Pathological between limbs
|-
| 1006 || E,9.0 Ch., 37x26x22 || Poor || Formol || P || Cor. || 20 || {{HE}} or. G. || 1914 || Operative. Most-advanced third
|-
| 1091 || E,7.2 Ch., 28x26x20 ||  Poor ||  P || Cor. || 20 ||  Al. coch. || 1915 || Macerated
|-
| 1354 || E,7.8 Ch, 35x30x25 || Good ||  Formol || P || Sag. ||  20 || Al. coch. || 1916 || Least-advanced third
|-
| 1767 ||  E , 11.0 Ch, 41 X23X5 ||  Good ||  Formol || P || Sag. || 40 ||  {{HE}} or. G. || 1917 || Most-advanced third
|-
| 2743 ||  E., 7.2 Ch., 19xl8x 14 ||  Poor || Formol || P || Trans. || 20 ||  Al. coch. || 1919 || Macerated. Least-advanced third
|-
| 3216 || E, 6.5 Ch, 30x30x5 ||  Good ||  Formol || P || Trans. ||  20 || Al. coch. || 1920 || Hysterectomy. Least-advanced third
|-
| 3385 ||  E,83 Ch., 25x20x16|| Exc. || Corros. acetic ||  P || Trans. || 20 || {{HE}} or. G. || 1921 || Some sections lost. Most-advanced third. Ag added
|-
| [[:Category:Carnegie Embryo 3441|3441]] ||  E,8.0 Ch., 25x24x20 || Good ||  Formol || P || Sag. ||  10 ||  Al. coch. ||  1921 ||
|-
| [[:Category:Carnegie Embryo 3512|3512]] ||  E,8,5 Ch., 33x28x25 || Good ||  Formol || P || Trans. || 10 || Al. coch. ||  1921 ||
|-
| 3952 || E,6,7 Ch., 30x25x15 ||  Good ||  Formol || P || Cor. || 15 || Al. coch. || 1922 || Median in group
|-
| 4602 ||  E,9.3 Ch,, 33x30x26 || Good ||  Formol || P ||  Sag. ||  15 ||  Al. coch. || 1924 || Medical abortion
|-
| 4782 ||  E,9.0 Ch., I4xl3x 11 || Poor  || Formol || P  || Cor. || 20 || Al. coch. || 1924 ||
|-
| 5772 || E, 8 || Poor ||  ? || P  || Cor. || 15 || Al. coch. eosin || 1928 ||
|-
| 5?92 || E, 3 || Good ||  Corros. acetic || C-P  || Cor. || 10 || Al. coch. phlox || 1929 || Transitional to next stage
|-
| 6223 || E ? || Poor || Alc. || C-P  || Sag. || 8 || Or. G. || 1930 || Fragmented sections. Not saved
|-
| 65?? || 
|-
| 6??? ||
|-
| 6508 ||
|-
| 6595 ||
|-
| ???? ||
|}
{{Carnegie Collection stage 15 table}}
[[1987 Developmental Stages In Human Embryos - Stage 15|1987 - Stage 15]] | [[Carnegie stage 15]]
==Stage 16==
{| class="wikitable"
|-
! Serial No. !! Size (mm) !! Grade !! Fixative !! Embedding Medium !! Plane !! Thinness (µm) !! Stain  !! Year !! Notes
|-
| [[:Category:Carnegie Embryo 163|'''163''']] || E., 9.0 Ch., 35x35x20  || Good || Formol || P || Transverse || 20 || Al. coch. || 1899 || Used by Bardeen and Lewis
|-
| [[:Category:Carnegie Embryo 221|'''221''']] || E., 7.5 Ch., 40x33x33  || Poor || Formol || P || Sagittal || 20 || Al. coch. || 1903 || Macerated
|-
| 383 || E., 7.0 Ch., 15x15x15  || Poor || Formol || P || Trans. || 10 || Al. carm., H. & Congo red || 1904 ||
|-
| 397 || E., 8.0 Ch., 15x15x15  || Poor || Formol || P || Trans. || 10 || {{HE}} || 1907 ||
|-
| 422 || E., 9.0 Ch., 30x30x30  || Poor || Alc. || P || Trans. || 40 || Al. coch. || 1910 || {{Tubal}}. Partly macerated
|-
| 559 || E., 8.6 Ch., 20x15x12  || Good || Formol || P || Trans. || 20 || H. & Congo red || 1911 || Cyclopia. Formerly listed as stage 17
|-
| 589 || E., 11 Ch., 30x13x13  || Poor || p || P || Sag. || 50 || Al. coch. || 1912 ||
|-
| [[:Category:Carnegie Embryo 617|'''617''']] || E., 7.0 Ch., 18x14x12  || Good || Formol || P || Trans. || 15 || Al. coch. || 1912 || Median in group
|-
| 636 || E., 10 Ch.,28x28x22  || Poor || Formol || P || Trans. || 50 || Al. coch. || 1913 || Macerated
|-
| 651f || E., 7 Ch., 25x20x15  || Poor || p || p || p || p || p || 1913 || Spina bifida
|-
| 675 || E., 10 Ch., 50x30x25  || Poor || Formol || P || Sag. || 100 || Carmine || 1915 || Abnormal head and limbs
|-
| [[:Category:Carnegie Embryo 792|792]] || E., 8.0 Ch., 40x30x30  || Good || Formol || P || Trans. || 20 || Al. coch. || 1913 || Advanced
|-
| 887 || E, 9.0 Ch., 31x28x17  || Good || Formol || P || Trans. || 40 || Al. coch. || 1914 || Near next stage
|-
| 1121 || E., 11.8  || Good || Corros. acetic || P || Cor. || 40 || Al. coch. || 1915 || Operative. Median in group
|-
| 1197 || E., 10.0 Ch., 23x19x15 || Good || Formol || C || Sag. || 20 || {{HE}}, or. G. || 1915 || Advanced
|-
| 1544 || E., 7.2  || Good || Zenker || P || Sag. || 20 || Al. coch. || 1916 || {{Tubal}}. Mechanical injury
|-
| 1836 || E., 11.0 || Good || Formol || P || Trans. || 20 || {{HE}} || 1917 || Most-advanced third
|-
| 4677 || E., 9.5 Ch., 48x36x30  || Good || Formol || P || Trans. || 10 || Al. coch. || 1924 || Median in group
|-
| 5515 || E., 12.0 Ch., 47x37x25 || Good || Formol || C-P  || Trans. || 10 || {{HE}} || 1927 || Near next stage
|-
| 6054 || E., 7,0 Ch., 21x17x12  || Good || Formol || C-P || Trans. || 8 || {{HE}} || 1930 || Least-advanced third
|-
| 6507 || E., 9.0*  || Exc. || Corros. acetic || C-P || Cor. || 10 & 8 || Al. coch. || p || Middle or most-advanced third
|-
| 6509 || E. 8.1*  ||  Exc. || Corros. acetic || C-P || Cor. || 10 || Al. coch. || p || Least-adianced or middle third
|-
| 6510 || E., 10.1*  || Exc. || Corros. acetic || C-P || Cor. || 10 || Al. coch. || p || Close to No. 6507. Ag added
|-
| 6511 || E, 8.1*  || Good || Corros. acetic || C-P || Sag. || 10 || Al. coch., iron H. ||  p || Surface injured by fixative. Most-advanced third
|-
| 6512 || E., 7.0*  || Exc. || Corros. acetic || C-P || Trans. || 10 || Al. coch. || p || Least-advanced third. Borderline
|-
| 6513 || E., 7.2*  || Good || Corros. acetic || C-P ||  Cor. || 10 || Al. coch. || p || Surface injured by fixative. Least advanced in group
|-
| 6514 || E., 9 0*  || Poor || Corros. acetic || C-P || Sag. || 10 || Al. coch. || p || Most-advanced third
|-
| 6516 || E., 10 5*  || Good || Corros acetic || C-P || Sag. || 8 || Al. coch. || p || Most-advanced third. Double left kidney and ureter
|-
| 6517 || E., 10.5*  || Exc. || Corros. acetic || C-P || Trans. || 8 || Al. coch. || ? || Close to No. 6516
|-
| 6686 || E., 11.0 Ch., l7x17xP || Poor || Formol || C-P ||  Cor. || 20 || Al. coch. || 1933 || {{Tubal}}. Partly macerated
|-
| 6750 || E., 10.0  || Good || Formol || C-P || Trans. || 10 || H. & phlox. || 1933 || {{Tubal}}. Advanced
|-
| 6909 || E., 11.0 || Good || Bouin || C-P || Cor. || 10 || {{HE}} || 1934 || {{Tubal}}. Advanced
|-
| 6931 || E., 8.8 Ch., 3""x 33x16 || Good || Formol || C-P || Cor. || 10 || Al coch., phlox. || 1934 || Least-advanced third. Type specimen
|-
| 6950 || E.. 9 0 Ch., 3lx20x18 || Good || Formol ||  C-P  || Trans. || 10 || {{HE}} || 1934 || {{Tubal}}. Partly fragmented
|-
| 7?15 || E., 9.7  || Exc || Bouin || C-P  || Cor. || 10 || H. & phlox || 1935 || Operative. Less advanced
|-
| 7629 || E., 11.5 Ch., 31x31  || Good || Formol || C-P  || Cor. || 10 || Al. coch., phlox || 1939 || Hysterectomy. Most advanced in group
|-
| 7804 || E., 9.5 Ch., 26x21x16 || Good || Formol || C-P  || Trans. || 10 || {{HE}} || 1940 || Least-advanced third
|-
| 7897  || E., 12.2 Ch., 31x24x23  || Good || Formol || C-P  || Trans. || 10 || {{HE}} || 1941 || {{Tubal}}. Advanced
|-
| 8098 || E., 10.0 Ch., 30 || Good || Formol || C-P  || Cor. || 6 || {{HE}} || 1942 || {{Tubal}}. Median in group
|-
| 8112 || E., 10.9 || Exc. || Bouin || C-P ||  Cor. || 8 || {{HE}} || 1943 || Most-advanced third
|-
| 8179 || E., 11.9 Ch., 23x18x17 || Good || Formol || C-P || Cor. || 10 || {{HE}} || 1943 || {{Tubal}}
|-
| 8436 || E., 10.9 Ch., 13x15x1? || Good || Formol || P  || Cor. || 10 || Azan || 1946 || Advanced
|-
| 8692 || E., 10 || Good || Bouin || P || Trans. || 10 || {{HE}} || 1949 || Rubella. Medical abortion. Mechanically damaged
|-
| 8697 || E., 11.3 || Poor || Formol || C-P || Trans. || 10 || {{HE}} || 1949 || Perhaps stage 17
|-
| 8773 || E, 11 || Exc. || Bouin || P || Cor. || 10 || Azan || 1950 ||
|-
| {{CE8971}} || E., 10 Ch., 20.5x14.5x13.7 || Poor || Formol || || Trans. || 15 || {{HE}} || 1932 || Synophthalmia. Univ. Chicago No. H 1439
|-
| 9055 ||  E., ca. 10 || Exc. || Bouin || P || Trans. || 20 || Azan & Ag || 1953 || Damaged
|-
| 9229 || E, 9.5 || Exc. || Formol || P || Trans. || 6 || Ag & {{HE}} || 1954 || Stage 15, 16, or 17? Mislaid
|}


Serial No.
4 18
80
187
208
245
372 380
387 442 552 560 676 873 988
1380
1620
11%
2841 3360
Size (mm)
E.,7
E.,7
Ch., 18X18
E., 5.0
Ch., 24x18x8 E.,7
Ch., 35x30x25 E.,7
Ch., 22X11X11 E.,6
Ch., 13X12X10 E.,7
E,6
Ch., 20x20x14 E.,7
Ch., 45x40x50 E.,6
Ch.,25x20
E.,6
Ch, 40X28X28 E., 7.0
Ch, 24x24
E., 6.0
Ch, 35x20x17 E,6.0
Ch., 35x28x16 E,6.0
Ch., 38x30x23 E , 5."7
Ch, 36x24x24 E, 6.6
Ch, 35x30x8 E, 6.68
E , sy
Ch. 35x21
E.6.0
Grade
Poor p Poor p
Good Ale.
Poor ?
Poor ?
Fixative
Embedding medium Plane
Thin- ness (UJTI)
10 20
20 20 20
5
10 20
20 50 40 40 2 0 2 0 20 20 20
6 20
20
Stain Year
Al. coch. 1892 Al. coch. 1895
Al. coch. 1897
Al. coch. 1902
Al. coch. 1902
H.&E. 1904
H.-Congo red 1902 H.&E. 1906
H.&E. 1907 Al. coch. 1908 Al. coch. 1911 Al. coch. 1912 H.&E.
Notes
Poor Formol, Zenker
p
P Trans. •> Sag.
p Sag.
? Trans.
Fairp p Poorp p
Trans. Sag.
Good Formol Poor Formol Poor p
Poor Formol Good Carnoy Poor Formol
P Trans. p Cor.?
P Sag.
P Cor.
P Tr.-Cor.
P Sag.
P Trans.
P Cor.
P Sag.
? Trans. P Trans.
C Trans
Possible anencephaly
Good
Exc.
Good
Fair Good
Good
Formol-corros. acetic
Formol
Formol
? Ale.
Formol
Al. coch. 1914
Al. coch. 1916
Al. coch. 1916
Al. coch., or. G. 1919 H.&E,or.G 1920
H.&E,or.G 1920
In mvomatous uterus
Trans. Trans.
1913 Possible spina bifida Al. coch. 1914


{{Carnegie Collection stage 16 table}}
[[1987 Developmental Stages In Human Embryos - Stage 16|1987 - Stage 16]] | [[Carnegie stage 16]]
==Stage 17==
{| class="wikitable"
|-
! Serial No. !! Size (mm) !! Grade !! Fixative !! Embedding Medium !! Plane !! Thinness (µm) !! Stain  !! Year !! Notes
|-
| 353 || E, 11.0 Ch., 40x35x20 || Good || Formol || P || Cor. || 10 || H.&E. || 1906 || Very advanced
|-
| 485 || E, 13.0 Ch., 33x25 || Exc. || Formol || P || Cor. || 40 || Al. coch. || 1911 || Injected (India ink)
|-
| 544 || E., 11.5 Ch., 30 || Good || Zenker-Formol || P || Sag. || 40 || Al. coch. || 1911 || Operative Injected (India ink)
|-
| 562 || E, 13.0 Ch., 28x17x17 || Poor || Formol || P || Sag. || 100 || Al. coch. || 1912 || Advanced
|-
| 623 || E 10.1 || Good || Ale. || P || Trans. || 20 || H. & Congo red || 1912 || Operative. Median in group
|-
| 695 || E, 13.5 Ch., 40x40x17 || Poor || Formol || P || Trans. || 10 || H. & Congo red || 1913 || Macerated
|-
| 916 || E, 11.0 Ch, 30x30x16 || Good || Bouin || C || Trans. || 40 || H.&E, or. G. || 1915 || Most-advanced third
|-
| [[:Category:Carnegie Embryo 940|940]] || E, 14.0 Ch, 28x23x21 || Good || Formol || C || Trans. || 40 || H.&E, or. G. || 1914 || Advanced
|-
| 1232 || E, 14.5 Ch., 35x35x30 || Poor || Formol || P || Cor. || 40 || Al. coch. || 1915 || Close to No.1267A
|-
| 1267A ||  E-a 145 Ch., 35x30x26 40 || Good || Formol || C || Sag || 20 || H.&E.. or. G || 1915||  Excellent CN.S.
|-
| 1267B ?? || E, 125 || Good || Formol || p || Sag. || 20 || H.&E. || 1917 || {{Tubal}}
|-
| 5642 || E, 11.5 Ch.. 33x30x17|| Good || Formol || p || Trans. || 15||  Al. coch. || 1928 || Right upper limb injured
|-
| 5893 || E.. 13.2 || Good || Formol || C-P || Trans. || 20 || Al. coch. || 1929 || Most advanced in group
|-
| [[:Category:Carnegie Embryo 6258|6258]] || E. 14.0 Ch 48x35x25|| Good || Formol || c—1= || Trans. || 10 || H.&E. || 1930 || Median in group
|-
| 6519 || E.. 10.8* || Exc || Corrov acetic || C-P || Sag. || 8 || A1. coch. || ? || Least-advanced or middle third
|-
| 6520 || E., 14.2* || Exc. || Corros. acetic || C-P || Trans. || 10 || Al. coch. || P || Median in group. Ag added to slides 1-25
|-
| 6521 || E., 13.2* || Exc. || Corros. acetic || C-P || Trans. || 8-18 || Al. coch.||  ? || Sections vary in thinness
|-
| 6631 || E., 13.0 || Good || Formol || C-P || Cor. || 10 || H.&E. || 1932 || {{Tubal}}. || Advanced
|-
| 6742 || E, 11.0 Ch.,50x40x15 || Good || Formol || C-P || Trans. || 12 || H. & phlox. || 1933 || Good primary germ cells
|-
| 6758 || E., 12.8 || Good || Formol || C-P || Trans. || 10 || H. & phlox. || 1933 || Least—advanced third
|-
| 7317 || E, 10.0* || Good || || P || Cor. || 10 || H.&E. || 1936 || His embryo “Ru." Every third section
|-
| 7436 || E., 13.0 || Good || Formol || C-P || Cor. || 30 || Al. coch. || 1937 || Most-advanced third
|-
| 8101 || E., 13.0 || Exc. || Bouin || C-P || Trans. || 10 || H.&E. || 1943 || Operative
|-
| 8118 || E., 12.6 || Exc. || Bouin || C-P || Cor. || 10 || H.&E. || 1943 || Middle third
|-
| 8253 || E., 11.2 Ch.,30x20x10|| Good || Bouin || C-P || Cor. || 10 || Al. coch., phlox. || 1944 || Operative. Least advanced in group
|-
| 8789 || E., 11.7 || Exc. || Bouin || C-P || Sag. || 10 || Azan || 1950 ||
|-
| 8969 || E., 11.2 || Exc. || ? || p || Trans. || 15 || Azan || 1919 || Univ. Chicago No. H566
|-
| 8998 || E., 11.0 || Exc. || ? || C-P || Cor. || 10 || Azan || 1952 ||
|-
| 9100 || E., 12.0 Ch., 12x13x10 || Exc. || Formol-chrom. subl. || C-P || Sag. || 10 || Azan || 1933 || Univ. Chicago No. H1475
|-
| 9282 || E, 12.0 Ch., 16 || Good ||  Ale.||  p || Trans. || 15 || Ag || 1955 || Mislaid
|}
{{Carnegie Collection stage 17 table}}
[[1987 Developmental Stages In Human Embryos - Stage 17|1987 - Stage 17]] | [[Carnegie stage 17]]
==Stage 18==
{| class="wikitable"
|-
! Serial No. !! Size (mm) !! Grade !! Fixative !! Embedding Medium !! Plane !! Thinness (µm) !! Stain !! Semi. ducts !! P.-M. duct (mm) !! Year !! Notes
|-
| [[:Category:Carnegie Embryo 109|'''109''']] || E., 12.0* Ch.,30  || Poor  || Alc.  || P  || Trans.  || 20  || Al. coch.  || 1 || 0.4  || 1897  || {{Tubal}}. Least—advanced third
|-
| 144  || E., 16.0* Ch, 40x30x30 || Good  || Formol  || P  || Sag.  || 40  || Al. coch.  || 3 || 0.85  || 1899  || Most—advanced third
|-
| {{CE175}}  || E., 13.0 Ch, 30x25x25 || Poor || Alc.  || P  || Trans.  || 20  || Al. coch.  || 2 || 0.6  || 1900  || {{Tubal}}. Partly macerated
|-
| 296  || E., 17.0  || Poor  || Ale.  || P  || Cor.  || 20  || Various  || 3 || 0.85  || 1905  || Most—advanced third
|-
| 317  || E., 16.0  || Good  || Formol  || P  || Cor.  || 20  || H. &or.G.  || 2 || 0.7  || 1905  || Middle third
|-
| 351  || E.,14.0*  || Good  || Formol  || P  || Cor.  || 250  || Slightly carmine—  || 2 || 038  || 1904  || Injected (Berlin blue)
|-
| 406  || E., 16.0 Ch., 40x40x40  || Good  || Formol  || P  || Sag.  || 20  || H.&E.  || 3 || 0.7  || 1907  || Operative. Most—advanced third
|-
| [[:Category:Carnegie Embryo 423|'''423''']]  || E., 15.2  || Good  || Formol—Zenker  || P  || Trans.  || 50  || Carmine  || 3 || 0.85  || 1904 ||
|-
| [[:Category:Carnegie Embryo 424|'''424''']]  || E., 172  || Good  || Formol  || P  || Trans.  || 50  || Carmine  || 3 || 10  || 1904  || Double infection. Advanced
|-
| [[:Category:Carnegie Embryo 492|'''492''']]  || E, 16.8 Ch, 40 x 40  || Exc.  || Zenker  || P  || Cor.  || 40  || Al. coch. v || 3 || 0.7  || 1911  || Injected (India ink)
|-
| [[:Category:Carnegie Embryo 511|'''511''']]  || E., 160* Ch., 3?* 32x32 || Good || Ale. ||  P || Sag. || 40 || Al. coch. || 3 || 1.1 || 1911 || Head injured. Most advanced in group
|-
| 670 || E, 12.5  || Poor  || Ale.  || P  || Sag.  || 50  || H.&E.  || 3 || 10  || 1913  || {{Tubal}}. Advanced
|-
| 719 || E, 15.0 Ch, 50x50x50 || Good || Formol  || P  || Trans  || 40  || Al. coch.  || 2 || 0.6  || 1913  || Median in group
|-
| 733  || E., Ch., 4Sx40x2S || ISO Poor  ||  Formol  || P  || Sag. || 50 ||  Al. coch.  || 2 || 0.6  || 1913  || Median in group
|-
| [[:Category:Carnegie Embryo 841|'''841''']]  ||  E. 15.0 Ch., 18 x 16x9  || Good || Formol || P || Cor.& Trans, 20 || 10 || H.&E.. carmine || 2 || 0.32 || 1914 || Operative. Head cut separately
|-
| 899  || E, 160* Ch. 50 x 18 x IS || Good || Bouin || P || Sag. || S0 || Al. coch. || 3 || 0,65 || 1914 || {{Tubal}} Head injured
|-
| 991  || E. l?.0 || Good || Formal || P || Sag || so || R, V, Gieson || 3 || 0.9 || 1914 || Advanced
|-
| 1909  || E., 14.6 || Good || Formol || P || Cor. || 20 || Al. coch,or. G. || 1 || 0.3 || 1917 || Less advanced
|-
| 2673  || E.,15.5 || Good || Formol || P || Trans. || 40 || Al. coch. || 2 || 0.52 || 1919 || Median in group
|-
| 4430 || E., 14.0 Ch, 51 x40x21 || Exc. || Corros. acetic || P || Trans. || 15 || Al. coch,or. G. || 3 || 0.9 || 1923 || Most—advanced third
|-
| 5542B || E., 16.0 Ch, 37x32x25 || Good || Formol || P || Trans. || 40 || Al. coch. || 2 || 0.7 || 1927 || Other twin abnormal
|-
| 5747 || E, 15.2 Ch, 32x27x25 || Poor || Alc.—formol || P || Sag. || 25 || Al. coch. || 2 || 0.25 || 1928 || Least—advanced or middle third
|-
| 5935A || E, 13.5 Ch, 40x30x30 || Good || Formol || P || Cor. || 40 || Al. coch. || 1 || 0.38 || 1929 || Other twin stunted
|-
| 6522 || E, 13.2* || Good || Corros. acetic || C—P Cor. || 10 || || Al. coch. || 3 || 0.8 || 7 || Middle or most—advanced third
|-
| [[:Category:Carnegie Embryo 6524|'''6524''']] || E, 11.7* || Exc. || Corros. acetic || C—P || Trans. || 10 || Al. coch. || 1 || 0.4 || ? || Least—advanced third
|-
| 6525 || E, 13.8* || Exc. || Corros. acetic || C—P || Sag || 8 || Al. coch. || 2 || 0.42 || ? || Weak staining
|-
| 6527 || E, 14.4* || Exc. || Corros. acetic || C—P || Trans. || 15 || Al. coch. || 2 || 0.67 || ? || Mechanical damage
|-
| 6528 || E, 13.4* || Exc. || Corros. acetic || C—P || Cor. || 8 || Al. coch. || 1 || 0.33 || ? || Least—advanced third
|-
| 6529 || E, 15.6* || Good || Corros. acetic || C—P || Cor. || 10 || Al. coch. || 2 || 0.4 .5 ||  || Middle third
|-
| 6533 || E, 12.5* || Good || Corros. acetic || C—P || Sag. || 6, 8, 10 || Al. coch. || 2 || 0.45 || ? || Middle third
|-
| 6551 || E, 18.0 || Poor || Formol || p || Cor. || 40 || H.&E. || 3 || 0.8 || 1932 || {{Tubal}}
|-
| 7707 || E, 14.5 Ch ,37x32|| Exc. || Bouin || C—P || Trans. || 10 || H.&E, phlox. || 2 || 0.54 || 1939 || Operative. Middle third
|-
| 8097 || E, 15.5 Ch, 37x25x21 || Good || Formol || C—P || Trans. || 10 || H.&E. || 1 || 0.19 || 1942 || Least advanced in group
|-
| 8172 || E, 16.5 || Exc. || Bouin || C—P || Trans. || 20 || H.&E. || 3 || 0.58 || 1943 || Operative. Very advanced
|-
| 8235 || E, 14.0* || Good || Bouin || C—P Sag. || 10 || H.&E., || Mallory || 2 || 0.25 || 1944 || {{Tubal}}
|-
| 8355 || E, 15.0 Ch, 23 || Exc. || Formol || C—P || Cor. || 10 || Azan || || || 1946 || {{Tubal}}. Duplicated spinal cord caudally
|-
| 8812 || E, 12_9 || Exc || Formol || C—P || Trans. || 10 || H.&E. || || || 1950 || Rubella. Medical abortion. Midbrain punctured
|-
| 8945 || E, 13.9 || Good || Zenker || p || Trans. || 8 || Borax, carm. || || || 1952 || Univ. Chicago No. H 1254
|-
| 9107 || E, 17.0 Ch, 38x28x22 || Good || Bouin || p || Trans. || 15 || Borax, carm. || || || 1918 || Univ. Chicago No. H 516
|-
| 9247 || E, 15.0 || Exc. || Bouin || C—P || Sag. || 8 || Azan || || || 1954 || {{Tubal}}
|}
{{Carnegie Collection stage 18 table}}
[[1987 Developmental Stages In Human Embryos - Stage 18|1987 - Stage 18]] | [[Carnegie stage 18]]
==Stage 19==
{| class="wikitable"
|-
! Serial No. !! Size (mm) !! Grade !! Fixative !! Embedding Medium !! Plane !! Thinness (µm) !! Stain  !! Score || Sex !! Year !! Notes
|-
| 17 || E, 18 Ch, 40x30x20 || Poor  || Alc.  || P  || || 50, 100 || Al. carm. || 16.5 || M || 1894 ||
|-
| 43  || E, 16  || Good  || Alc.  || P  || || 50  || Al. coch.  || 10  || M 1 || 1894 ||
|-
| 293  || E, 19  || Poor  || Ale.  || P  || Sag.  || 50  || Coch.  || 16.5  || S  || 1905 ||
|-
| 390  || E, 19  || Good  || Formol? ||  P  || Sag.  || 20,  || H.&E.  || 11.5  || M  ||  1906  || {{Tubal}}. Injected
50
|-
| 409  || E.18  Ch, 50x40x40 || Good  || Formol  || P  || Trans.  || 20  || Copper, iron H. &  erythrosin || 14.5  || M  || 1907 ||
|-
| 432  || E..18.5 Ch , 45x35x20 || Good  || Formol  || P  || Sag.  || 20  || H. & Congo red  || 13.5  || M  ||  1910  || {{Tubal}}
|-
| 576  || E. 17  Ch, 60x40 || Good  || Formol  || P  || Sag.  || 15,  20  || {{HE}}  || 14.5  || d  || 1912  || {{Tubal}}
|-
| 626  || E., 21.5  Ch., 40x30x21|| Good  || Formol  || P  || Trans.  || 100  || Al. coch.  || 14_5  || 6  || 1913 ||
|-
| 6??8 || E, 20 Ch, ca. 30 ||  Poor  ||  Formol  || P  || Sag.  || 50  || Al. coch.  || 12  || 9  || 1913  || Head damaged
|-
| 709  || E, 19 Ch. 40x35x25|| Poor  ||  Alc. ||  P  || Car.  || 40  || Al. coch, Lyons blue  || 15 || 49  || 1913 ||
|-
| 837 || E. 21 Ch. 65X45x || Good || Formol  || P  || Sag.  || 40  || Al. coch.  || 14.5  || P  || 1914 ||
|-
| 1324  || E., 18 50x30x18  || Good  || Formol  || C  || Cor.  || 40  || {{HE}}, aur, or. G || 125 || 79 || 1915 ||
|-
| 1332 || E., 19 Ch., 40x43x22 || Poor  || Formol  || C  || Cor.  || 40  || {{HE}} aur, or. G.  || 15  || M  || 1915 ||
|-
| 1390  || E., 18 Ch, 40X38X15 || Good  || Formol  || P  || Sag.  || 20  || Al. coch.  || 10_5  || M  || 1915  || {{Tubal}}
|-
| 1534  || E., 13 Ch.,35x31.x25 || Poor || Formol  || P || 53%  || 50  || Al. coch.  || 13.5  || F  || 1916  || Protruding midbratn
|-
| 2114  || E., 19.3 Ch., 49x42x33 || Good || Formol || P || Trans. || 40 || A1. coch. || 12 || M || 1918 ||
|-
| 4405  || E., 15.5 || Good || Formol  || P  || Trans.  || 10  || Coch, Mallory  || 13.5  || <3  || 1923  || Midbrain injured
|-
| 4501  || E, 18  || Exc.  || Bouin  || P  || Trans.  || 15  || Coch, or. G.  || 14.6  || || 1924  || Cystic left kidney
|-
| 5609  || E., 18  || Exc.  || Formol  ||  P  ||  Cor.  || 25  || A1. coch.  || 135 6 || ||
|-
| 6150  || E., 17 Ch., 40x39x30 || Good  || Bouin  || C-P  || Trans.  || 15  || {{HE}}  || 16.5  ||  M  || 1930  || {{Tubal}}
|-
| 6824  || E., 18.5  Ch., 45x40x25|| Good  || Formol  || C-P  || Sag.  || 12  || {{HE}}  || 14.5  || F  || 1933 ||
|-
| 7900  || E., 16.5  || Good  || Bouin  || C-P || Sag.  || 20  || {{HE}}, phlox.  || 11.5  || . .  || 1941  || {{Tubal}}
|-
| 8092  || E., 16.3  Ch., 52 x 47 || Exc.  || Bouin  || C-P  || Trans.  || 20  || {{HE}}, phlox.  || 13  || M  || 1942 ||
|-
| 8913  || E.,? Ch, 34 || Poor  || Formol  || p  || Trans.  || 10  || Alan .|| 7 ||  || 1951  || Rubella. Medical abortion. Isolated head damaged
|-
| 8965 || E, 19.1 Ch, 42x32x19  || Good  || Formol—Zenker ||  C-P  || Trans,  || 10 || Borax, carm, or. G. || || || 1952 || Univ. Chicago No. H 173
|-
| 9097  || E, 21  || Exc.  || Fo1rno1—glucose  || C-P  || Cor.  || 10  || Azan ? . || ? ||  || 1930  || Univ. Chicago No H 1380
|-
| 9113  || E, 185 Ch, 24 || Exc.  || Formol  || C-P  || Trans.  || 10  || Alan > 6  || || || 1953  || Rubella. Medical abortion
|-
| 9325 || E, 17.0 Ch, 32x28x20 || Good  || Formol  || —acetic p  || Trans. || 15& 8-10 || Azan & Ag || ? || -  || 1955  || {{Tubal}}
|}
{{Carnegie Collection stage 19 table}}
[[1987 Developmental Stages In Human Embryos - Stage 19|1987 - Stage 19]] | [[Carnegie stage 19]]
==Stage 20==
{| class="wikitable"
|-
! Serial No. !! Size (mm) !! Grade !! Fixative !! Embedding Medium !! Plane !! Thinness (µm) !! Stain  !! Point Score !! Sex !! Year !! Notes
|-
| 240 || E, 20 Ch, 50x40x30 || Poor  || Formol  || P  || Cor.  || 20  || Iron H.  || 27  || d  || 19??  ||
|-
| 256 || E, 21  || poor  || A1c || p  || Sag.  || 25  || Coch.  || 23  || M ||  1904 || {{Tubal}}. Partial anencephaly
|-
| 353 || E, 20 || Poor || A1c  ||  P  || Sag.  || 20  || H. & Congo red  || 22,5  || M ||  1906 ||
|-
| 431 || E, 19 Ch, 30x25x25 || Good  || Formol  || P  || Sag.  || 20  || H. & Congo red  || 25,5  || M ||  1908  || {{Tubal}}
|-
| 437 || E, 23 Ch., 80x60x50 || Poor  || Formol  || P  || Sag.  || 50  || Coch  || 24  || M  ||  193?  ||
|-
| 453 || E, 23 Ch, 60x40x30 || Poor  || Formol  || P  || Sag.  || 20  || H. & Congo red  || 23-5 ||  ?  || 1910 || Injected
|-
| {{CE460}} || E, 21 || Exc.  || Bichlor. acetic  || P  || Trans.  || 40  || H.&E., coch,  || 24.5  || M  || 1910  || injected
|-
| 462  || E, 20 Ch, 50x40x30 || Exc.  || Formol  || P  || Trans.  || 40  || Al, coch  || 23.5  || F || 1910 ||
|-
| 635B  || E, 22  || Poor  || Ale ||  P  || Trans  || 50 || Al, coch || 26.5 || M || 1913
|-
| 657 || E, 25 Ch, 35x20x15 || Poor || Formol || C || Sag || 40 || Al, coch || 26.5 || M || 1913 || {{Tubal}}
|-
| [[:Category:Carnegie Embryo 966|966]] || E, 23 Ch, 51x38x13 || Exc  || Bichlor. acetic || P || Cor || 40 || H.&E, aur, or. G || 25 || M || 1911 || {{Tubal}}
|-
| [[:Category:Carnegie Embryo 1134B|'''1134B''']] || E, 23 || Poor ||  Formol  ||  p  ||  Sag  ||  100 || Al. coch., || 22 || - || 1915 ||
|-
| 1266 || E, 23.1 || Poor || Formol  || C-P || Sag.  || 25  || Al. coch., H&E aur, or G || 20.5 || F || 191? ||
|-
| [[:Category:Carnegie Embryo 2393|2393]] || Ch, 61.5x50x35 || Poor ||
|-
| 3527  || E., 22 Ch. 32x30x10 || Good  || Formol  || P  || Sag.  || 25  || Al. coch., || 28 || ? || 1921 ||
|-
| 4059  || E, 21.6 || Good  || Formol  || P  ||  Cor.  ||  15  || Al. coch., Mallory  || 29.5  || $  || 1922 ||
|-
| 4148  || E, 21 Ch. 45x34x30|| Good  || Formol  || p  || Con  || 15  || A1. coch., Mallory  || 19  || ?  || 1922 ||
|-
| 4361  || E, 22 Ch., 52x42x23 || poor || Formol || 9 || Trans.  || 20  || Coch.  || 24  || 8  || 1923 ||
|-
| 6202  || E, 21 Ch., 35x35x22 || Exc || Bouin  || P  || Sag.  || 20  ||  H.&E  || 20.5  || 8  || 1930  || {{Tubal}}
|-
| 6426 || E 21.5  || Good  || Formol  || C—P  || Trans.  || 20  || H&E  || -  || 21 3  || 1931 ||
|-
| [[:Category:Carnegie Embryo 7274|7274]] || E, 18.5 Ch., 48x44x35 || Exc || Bouin  || C—P  ||  Trans.  || 20 || H.&E., phlox. || 20 || M || 1936 ||
|-
| [[:Category:Carnegie Embryo 7906|7906]] || E19.5  || Exc || Bouin  || C—P  || Cor.  || 20  || H.&E.  || 22 || 8  || 1941 || Left renal agenesis
|-
| [[:Category:Carnegie Embryo 8517|8517]]  || E., 20.8  || Exc.  || Bouin  || C—P  || Cor.  || 20  || H.&E.  || 24  || 8  || 1943 ||
|-
| 8226  || E, 18.0  || Exc.  || Bouin  || C—P  || Sag || 10  || Alan ||  ?  || 3  || 1944 ||
|}
{{Carnegie Collection stage 20 table}}
[[1987 Developmental Stages In Human Embryos - Stage 20|1987 - Stage 20]] | [[Carnegie stage 20]]
==Stage 21==
{| class="wikitable"
|-
! Serial No. !! Size (mm) !! Grade !! Fixative !! Embedding Medium !! Plane !! Thinness (µm) !! Stain !! Point Score !! Sex !! Year !! Notes
|-
| {{CE22}} || E, 20  Ch, 35x30x30 || Good || Alc. || P || Trans. || 50 || Al. coch. || 34.5 || F || 1895 ||
|-
| 57 || E, 23 Ch., ca. 30 || Poor || Alc. || P || Sag.||  50 || Al. coch. || 36 || M || 1896 ||
|-
| [[:Category:Carnegie Embryo 128|128]] || E, 20 Ch., 50x43 || Good  || Formol || P || Cor. || 50 || Al. coch. || 33 || F || 1898 ||
|-
| 229  || E, 19  || Poor  || Alc. || P || Sag. || 50 || Al. coch. || 33 || F || 1903 ||
|-
| [[:Category:Carnegie Embryo 349|'''349''']] || E, 24  || Good || Zenker || C || Cor. || 250 || Unstained || 36 || ? || 1905 || Double vascular injection
|-
| 455  || E, 24 Ch., 42x34x20 || Good || Alc. || P || Trans. || 30 || {{HE}} || 36.5 || M || 1910 || 
|-
| [[:Category:Carnegie Embryo 632|'''632''']]  || E, 24 Ch., 60x50x30 || Good || Bichlor. acetic || P || Sag.|| 40, 100, 250 || Al. coch. || 33 || F  || 1913 || Injected
|-
| 903C  || E, 23.5  || Good  ||  Formol || P || Trans. || 40 || Al. coch. || 38.5 || F || 1914 ||
|-
| 1008  || E, 26,4  || Good  ||  Formol || P || Sag.|| 40 || Al. coch. || 39 ||  ?? || 1914 ||
|-
| [[:Category:Carnegie Embryo 1358F|'''1358F''']] || E, 23 || Good  ||  Formol || P || Sag.|| 40 || Al. coch. || 37.5 ||| F || 1916 ||
|-
| 2937 || E,, 24.2  || Good  || Bouin || P || Trans. || 50 || {{HE}} aur., or. G. || 39 || F || 1920 ||
|-
| 3167 || E., 24.5 Ch., 60x50x40  || Poor || Bichlor, acetic, formol ||  P || Trans. ||  20 || Al. coch. || 32 || M || 1920 ||
|-
| [[:Category:Carnegie Embryo 4090|4090]] ||  E, 22.2 Ch.. 66x46x30 || Good  ||  Formol || P || Trans. || 40 || Al. coch. || 30 || F || 1922 ||
|-
| 4160  || E,25  || Poor ||  Formol || P || Sag.|| 25 || {{HE}} || 39 || M || 1923 || {{Tubal}}
|-
| 4960  || E.22 Ch,, 47x42x28 || Good || Formol || P ||  Trans. || 15 || Al. coch., Mallory || 31.5 || F || 1925 ||
|-
| 5??6  || E. 215  || Good || Formol || P || Sag.|| 20 || {{HE}} || 34 || F || 1927 ||
|-
| 6531  || E,22  || Poor  || Glacial acetic, || C-P || Trans. || 10 || {{HE}} || 31.5 || F || 1931 || Leitz Collection ||
|-
| 72S4  || E,225  || Exc || Bouin || C-P || Trans. || 20 || {{HE}} || 33.5 || M || 1936 ||
|-
| [[:Category:Carnegie Embryo 7592|7592]] || E,22-> || Exc. || Bouin || C-P || Trans. || 20 || {{HE}} || 36 || F || 1937 ||
|-
| 1*64  || E., 24  || Exc,  ||  Formol || C-P || Frontal || 20 || {{HE}} || 32.5 || M || 1941 ||
|-
| [[:Category:Carnegie Embryo 8553|8553]]  || E., 22  || Exc  || Bouin ||  C-P || Trans. || 12 || {{HE}} || 38 || F || 1947 ||
|-
| 9614  || E,,22 5  || Exc  || Bouin || P || Cor. || 10 &15 || Azan || ? || ? || 1958 || Rubella. Hysterectomy
|-
| colspan=12|'''Abbreviations'''
* Size -  E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
* Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
* Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
* Fixative - formalin (Formol), alcohol and formalin (Alc, formol), {{Bouin}} (Bouin solution)
* Stain -
* ? - unknown or not determined.
|}
{{Carnegie Collection stage 21 table}}
[[1987 Developmental Stages In Human Embryos - Stage 21|1987 - Stage 21]] | [[Carnegie stage 21]]
==Stage 22==
{| class="wikitable"
! colspan=12| [[Carnegie Collection]] - [[Carnegie stage 22|Stage 22]]&nbsp;
|-
! Serial No. !! Size (mm) || Grade !! Fixative !! Embedding Medium || Plane || Thinness (µm) !! Stain  !! Point Score !! Sex !! Year !! Notes
|-
| {{CE392}} || E., 23 Ch., 45x45x25 || Poor || ... ||  P || {{Sagittal}}  || 50 || Al. coch. || 42 || {{Female}} || 1907 || Brödel Collection. Injected
|-
| {{CE405}}  || E., 26  || Good  || Formol  || C  || {{Sagittal}}  || 40  || Carmine  || 42.5  || {{Male}}  || 1907 ||
|-
| {{CE464}}  || E.,26 Ch., 45x40x30|| Good  || Formol?  alc? || P  || Sag.  || 100  || Al. coch.  || 44.5  || {{Male}}  ||  1910 ||
|-
| 584A  || E.,25  Ch., 50x42x40 || Poor  || Formol  || P  || {{Sagittal}}    || 50  || Al. coch.  || 41  || ?  || 1913  ||
|-
| {{CE630}}  || E., 25  || Poor  || Formol  || P  || {{Transverse}}  || 100  || Al. coch.  || 46  || {{Male}}  ||  1913  ||
|-
| {{CE840}} || E, 24.8  || Good  || Formol  || P  || {{Transverse}}  || 50  || Al. coch.  || 44.5 || {{Female}}  ||  1914 ||
|-
| {{CE875}}  || E, 27 Ch., 40x28x22 || Good  || Formol  || P  || {{Sagittal}}  || 40  || Al. coch.  || 45  || {{Male}}  ||  1914 ||
|-
| {{CE895}}  || E., 26 Ch., 67x62x54 || Good  || Formol  || P  || {{Transverse}}  || 25  || Al. coch. ||  46.5  || {{Female}} || 1914 ||
|-
| {{CE1315}}  || E.,25  || Good  || Formol  || P  || {{Sagittal}}  || 50  || Al. coch.  || 40.5  || {{Female}}  ||  1915  || Spina bifida and anencephaly
|-
| {{CE1458}} || E., 27.5 Ch, 45x45x30 || Exc. ||  Formol  || C  || {{Sagittal}}  || 50  || {{HE}} aur, or. G.  || 45.5  || {{Male}} ||  1916 ||
|-
| {{CE1894}} || E, 24.6  || Good  || Formol  || c  || {{Sagittal}}  || 40,80  || {{HE}} aur, or. G. || 41  ||  {{Female}}  || 1917  ||
|-
| {{CE2206}} || E, 27 Ch, 50x30x18 || Poor  || Formol  || p  || {{Transverse}}  || 40  || {{HE}} ||  44.5  || {{Male}}  ||  1918 ||
|-
| {{CE3681}} || E, 26.3 Ch, 36x36x34 || Good  || Formol  || p  || {{Transverse}} || 25  || Al. coch.  || 44.5  || {{Male}}  || 1921  ||
|-
| {{CE4304}} || E,25  Ch, 66x45x45 || Good || Bouin || p || {{Transverse}} || 20 || {{HE}} || 44.5 || {{Female}} ||  1923 || Injected
|-
| {{CE4339}} || E, 24.5 || Good || Formol || p || {{Transverse}} || 15 || Al. coch, Mallory || 46,5 || {{Female}} ||  1923 ||
|-
| {{CE4476}} || E., 26.2 || Good || Bouin || p || {{Transverse}} || 40 || {{HE}} || 46 || {{Female}} || 1923 || {{Tubal}}
|-
| {{CE4638}} || E, 23.4 || Exc. || Bouin || p || {{Transverse}} || 15,20 || Al. coch, or. G. || 41.5 || {{Male}} || 1924 ||
|-
| {{CE6701}} || E, 24 || Poor || Formol || p ||  {{Coronal}} || 20 || {{HE}} || 41 || {{Female}} || 1933
|-
| {{CE6832}} || E, 25.8 || Exc. || Bouin || C-P ||  {{Coronal}} || 20 || {{HE}} || 42 || {{Female}} || 1934 ||
|-
| {{CE8394}} || E, 25.3 Ch, 48x50x34 || Exc. || Bouin || C-P ||  {{Transverse}} || 20 || {{HE}}, Masson || 44.5 || {{Female}} || 1946 ||
|-
| {{CE8948}} || E, 26.7 Ch, 61x51x50 || Poor || Formol-Zenker ||  p ||  {{Transverse}} || 15 || Ag || ? || ? || 1952 ||
|-
|}
{{Carnegie Collection stage 22 table}}
[[1987 Developmental Stages In Human Embryos - Stage 22|1987 - Stage 22]] | [[Carnegie stage 22]]
==Stage 23==
{| class="wikitable"
! colspan=11| [[Carnegie Collection]] - [[Carnegie stage 23|Stage 23]]&nbsp;
|-
! Serial No. !! Size (mm) || Grade !! Fixative !! Embedding Medium || Plane || Thinness (µm) !! Stain  !! Point Score!! Sex !! Year !! Notes
|-
| {{CE45}} || E,28 Ch, 40x35x20 || Poor || ? || P  || {{Coronal}}/{{Transverse}} || 50 || Al. coch. || 51.5 || {{Female}} || 1895 ||
|-
| {{CE75}} || E,30 || Good || Alc. || P || {{Sagittal}} || 50 || Coch. || 57 || {{Male}}|| 1897 ||
|-
| {{CE86}} || E,30 || Good || ? || ? || {{Coronal}} || 50 || Coch. ||  || {{Male}} || 1897 || May be an early fetus
|-
| {{CE100}} ||  E,27 || Poor || ? || P || {{Sagittal}} || 50 || Al. coch. || 57.5 || ? || 1897 ||
|-
| {{CE108}} || E, 28 (est.) || Poor  || Piurosulph. acid || P || {{Sagittal}} || 45 || Borax carm. || 52.5 || {{Male}} || 1897 ||
|-
| {{CE227}}  || E30 Ch, 60x40x20 || Poor || Formol  || P  || {{Sagittal}}  || 50, 100 || Al. coch.  || 54  || {{Female}} ||  1903 ||
|-
| {{CE417}}  || E,32 Ch., 0x60x40 || Good  || Formol  || P  || {{Transverse}} || 100  || Al. coch.  || 58.5  || {{Female}} ||  1907 ||
|-
| 756A ||  E, 27 Ch. 60x45x35 || Good  || Formol  || P  || {{Coronal}} || 50  || Al. coch.  || 56  ||  {{Male}} ||  1913 ||
|-
| {{CE882}}  || E , 28 Ch, 80x80x40 || Good  || Formol  || P  || {{Transverse}}  || 40  || Multiple  || 53  || 8  || 1913 ||
|-
| {{CE950}} || E, 29  || Good  || Formol  || P  || {{Transverse}}  || 50  || Al. coch.  || 54  || {{Male}} ||  1914 ||
|-
| {{CE1199}} || E.,26 Ch,, 60x40x30 || Good  || Formol  || C  || {{Coronal}}  || 40  || {{HE}}  aur , or. G.  || 54.5  || {{Male}}  ||  1915 ||
|-
| {{CE1535}}  || E , 28 Ch. 50x45 x15 || Poor  || Formol  || P || {{Transverse}}  || 40  || {{HE}}  || 495  || {{Female}} ||  1916 ||
|-
| {{CE1945}}  || E., 27.3 Ch., 83x53x22.5 || Good  || Formol  || C-P  || {{Transverse}}  || 50  || {{HE}}  aur., or. G.  || 48  || {{Male}} ||  1917 ||
|-
| {{CE2561}}  || E., 27 .5  || Good  || Formol  ||  C-P  || {{Transverse}}  || 25  || {{HE}}  aur., or. G.  || 48 .5  || {{Male}}  || 1919 ||
|-
| {{CE4205}}  || E., 29.5  || Good  || Bouin  || P  || {{Transverse}}  || 50  || A1. coch.  || 55.5  || {{Female}} ||  1923 ||
|-
| {{CE4289}} || E., 32.2 Ch., 52x35x25 || Good  || Formol  || P  || {{Transverse}} || 15, 20  || A1. coch., Mallory  || 59  || {{Female}}||  1923 ||
|-
| {{CE4525}}  || E., 30  || Good  || Formol  || P  || {{Sagittal}}  || 20  || {{HE}}  || 57  || {{Male}} || 1924 ||
|-
| {{CE4570}} || E, 30.7 Ch., 52X50X28 || Exc.  || Bouin  || P  || {{Transverse}}.  || 15  || {{HE}} , phlox.  || 55 || {{Male}}  || 1924 ||
|-
| {{CE5154}}  || E.,32  || Good  || Bouin  || P  || {{Transverse}} || 20  || {{HE}}  || 59.5  || S  || 1926 ||
|-
| {{CE5422}}  || E., 27  || Good  || Formol  || P  || {{Sagittal}}  || 40  || {{HE}}  || 52.5  || {{Female}}||  1927 ||
|-
| {{CE5621A}}  || E., 27.5  || Good  || Formol  || P  || {{Transverse}}  || 20  || {{HE}}  || 52.5  || {{Male}}  ||  1927  || Other twin has spina bifida and fused kidneys
|-
| {{CE5725}} || E, 23  || Good  || Formol  || P  || {{Coronal}}  || 25  || {{HE}} aur., or. G.  || 50.5  || {{Female}} ||  1928 ||
|-
| {{CE6573}} || E,31.5  || Good  || Bouin  || C  || {{Transverse}}  || 20  || {{HE}} || 58.5  || {{Female}} ||  1932 ||
|-
| {{CE7425}} || E, 27  || Exc.  || Bouin  || C-P  || {{Coronal}}  || 20  || {{HE}}  || 47  || {{Female}} || 1937  || Ag added
|-
| {{CE9226}}  || E, 31  || Exc.  || Formol  || C—P  || {{Transverse}}  || 12  || Azan || ? || {{Female}}  || 1954  ||
|-
| D.122  || E, 27 || Exc. || ?  || ?  || {{Transverse}}  || 19  || Ag ||  ? || ? ||  1976  || Yntema and Truex
|-
|}
{{Carnegie Collection stage 23 table}}
[[1987 Developmental Stages In Human Embryos - Stage 23|1987 - Stage 23]] | [[Carnegie stage 23]]


Serial Size No. (mm)
STAGE 14 (continued)
Thin- Embedding ness
Grade Fixative medium Plane (|im) Stain Year
Notes
3805 E., 5.9 Exc. 3960 E., 5.5 Good 4154 E,6.8 Poor
Ch., 33X31X20
4245-6 E., 7.0 Good 4629 E., 6.5 Good
Ch.,32x23
4672 E,8.2 Good
Ch., 40X34X25
4805 E., 7.3 Good
Ch., 15X8X9
5437 E., 7.0 Good
5654 E., 5.0 Good Ch., 30X23X17
5787 E., 6.8 Good Ch., 32x30x23
6428 E., 7.0 Good Ch., 30X28X25
6500 E, 4.9* Good
6502 E., 6.7* Exc.
6503 E., 6.3* Exc.
6739 E.,8 Poor 6830 E,5.5 Exc.
Ch., 47X23X15
6848 E., 7.8 Good 7324 E, 6.6 Good
Ch., 17x13x10
7333 E, 6.3 Good
7394 E, 7.2 Exc. Ch., 45X20X20
7400 E, 6.3 Good Ch., 35X25x20
7522 E., 7.7 Good Ch., 33x16x16
7598 E., 7.0 Poor Ch., 30x30x25
7667 E., 5 Fair Ch., 16x14x12
7829 E., 7.0 Exc. 7870 E,7.2 Exc.
Ch., 25X20X 13
8141 E,7.3 Exc.
15 H.&E.
20 Al. coch.
Ch.,33x28 8306 E.5.3
Ch., 27 8308 E, 5.85
Ch., 27X18X 18 8314 E,8
Ch.,23x22 S35"7 E., 6.5
8552 E,6.5 8999 E,6
Exc. Bouin C-P
Exc. Formol & Bouin C-P
Exc. Formol C-P
Good Formol C-P Exc. Ale. & Bouin C-P Exc. Ale. & Bouin C-P
Ch.,16x15
9695 E,8.5 ?
Not cut
Bouin P Formol C-P Ale. C-P
Formol P Formol C-P
Formol p
Formol C-P
Formol C-P Formol p
Formol p
Formol C-P
Souza? C-P Souza? C-P
Souza? C-P Formol C-P Formol C-P
Formol C-P Formol C-P
Formol C-P Formol C-P
Formol C-P
Formol C-P
Ale. C-P
Formol p
Bouin C-P Bouin C-P
Formol C-P
Trans. Cor. Trans.
Trans. Sag.
Trans. Trans.
Trans. Trans.
Sag.
Cor.
Sag. Trans.
Cor. Sag. Cor.
Cor. Trans.
Trans. Trans.
Cor.
Trans.
Trans.
Trans.
Trans. Trans.
Cor,
Trans.
Sag.
Trans.
Sag Trans. Sag.
1921 Evans embryo No. 168. Serial bromides only
1922 Blood vessels naturally injected 8 H.&E. 1923
15 Al. coch.
10 H.&E. 1924
20 Al. coch.
10 H.&E.
8 H.&E.
10 Al. coch., eosin
1924 Advanced 1924 Tubal
1927 Advanced 1928 Less advanced
10 Al. coch. 1928
6, Al. coch. 10
10 Al. coch. 5,
1931 Advanced
1931 E. Leitz, Berlin
1931 E. Leitz, Berlin. Ag added to slides 1-25
10 H.&E.
10 Al. coch.
20 H.&E. 1933
1931 E. Leitz, Berlin 8 H.&E. 1933
10 H.&E. 8 H.&E.
1934 Tubal
1936 Low implantation
8 H.&E. 1936 8 H.&E. 1937
10 H.&E. 1937
8 H.&E. 10 H.&E.
1938 Natural blood injection
1938 Macerated 8 H.&E., phlox. 1939
8 H.&E. 8 H.&E.
8 H.&E.
10&20 H.&E., phlox. 1945
8 Azan 1945 8 Azan 1945
8 Azan 1946 8 Azan 1947 8 Azan 1952
1955
1923 Univ. Pennsylvania No. 40. Ag added
1940 Advanced
1941 On borderline of next stage. Ag added
1943 Shrinkage cracks in brain


==Stage 15==




389 721
810
855 1006
1091 1354 1767 2743 3216 3385
3441
3512
3952
4602
4782
5772 5«92 f>223 65<W (rfOft
E., 9
E., 9.0
Ch., 30x20x10 E., 7.0
Ch, 30x25x15 E.,7.5
E,9.0
Ch., 37x26x22 E,7.2
Ch., 28x26x20 E,7.8
Ch, 35x30x25 E , 11.0
Ch, 41 X23X5 E., 7.2
Ch., 19xl8x 14 E, 6.5
Ch, 30x30x5 E,83
Ch., 25x20x16 E,8.0
Ch., 25x24x20 E,8,5
Ch., 33x28x25 E,6,7
Poor
Good Formol
Good Formol
Poor p
Exc. Zenker formol
Good Ale. Poor Formol
P P p
P P
P P
P P P P P P P P P P P P
Al. coch. 1914 20 H.&E., or. G. 1914
Ch., 30x25x15
E,9.3
Ch,, 33x30x26
E,9.0 Poor Ch., I4xl3x 11
10 Al.
10 Al.
15 Al.
15 Al.
20 Al.
coch. 1921
coch. 1921
coch. 1922
coch. 1924
coch. 1924
E, 8 Poor
E,-3 Good
E,f Poor Ale. E. "5* Exc.
F, "5* Exc.
E , "" V Good
E , HO Good
F , H4 Good
6595
"1W
-Mx 1" y5 Poor Formol
H.&E. 1932 Al. coch., phlox. 1935
Ch 35AMJx25 KV29 E , M 5
Ch, HH« 10 1 »9 *** F "'I
(h \"-29«i> mm I HH
jr Mil
I " f t
Exc. Ak. & Bouin C-P GlK»d Zenker C-P
Trans. 10 Sag. 10
Azan
1951
Poor Ale.
Poor Poor Good Good Poor Good Exc. Good Good Good Good
Formol Formol Formol Formol Formol Formol Corros. acetic Formol Formol Formol Formol Formol
Cor. Cor. Sag. Sag. Trans. Trans. Trans. Sag. Trans. Cor.
Sag. Cor.
Cor.
Cor.
Sag.
Sag.
Cor.
Trans. 6
Sag. 10
Cor. 10
Cor. 8 H.&E. 1936
p pp
?
Corros
15 Al. 10 Al.
coch., eosin 1928
Corros. Formol Formol
6 Al. coch. p 10 Al. coch. p Al. coch. p
acetic C-P C-P C-P C-P acetic C-P C-P C-P C-P
coch., phlox. 1929 8 Or.G. 1930
Exc. Zeriker
Exc Formal&Bouin p Cor.&Sag. 8 Azan 1952 Good Bouin p Cor. 8 Azan 1953
C-P
Trans.
Thin- Embedding ness
Serial Size
No. (mm) Grade Fixative medium Plane (|xm) Stain Year
Notes Least-advanced third
Shrunken and cracked Tubal
Median in group
Pathological between limbs Operative. Most-advanced third
Macerated
Least-advanced third
Most-advanced third
Macerated. Least-advanced third
Hysterectomy. Least-advanced third
Some sections lost. Most-advanced third. Ag added
Median in group Medical abortion
Transitional to next stage Fragmented sections. Not saved Least-advanced third. Ag added Most-advanced third. Ag added Many sections lost. Advanced
Operative. Good fixation Macerated. Median in group
Most-advanced third
Less advanced. Univ. Chicago No. H 1454
Univ. Chicago No. H 1324
Caudal quarter embedded separately Mechanically distorted
2 E., 7.0
Ch., 25X25X25
88 E.,8
Ch., 30x28x15
113 E.,8 241 E,6.0 371 E,6.6
Good Ale. P
Trans. 15 Cor. p
Sag. 10 Trans. 10 Sag. 10 Sag. 20 Trans. 15
Sag. 20 Trans. 100
Al. carm. 1888 Al. coch. 1897
Borax carmine ? H. & Congo red 1904 Al. coch. 1913 H.&E. 1907 H.&E. 1913
Al. coch 1913
20 Al. coch. 1915 20 Al. coch. 1916 40 H.&E., or. G. 1917 20 Al. coch. 1919 20 Al. coch. 1920 20 H.&E., or. G. 1921
H.&E.
6 H.&E. 1928
1932




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{{ORahilly1987 footer}}

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O'Rahilly R. and Müller F. Developmental Stages in Human Embryos. Contrib. Embryol., Carnegie Inst. Wash. 637 (1987).

Online Editor Note  
O'Rahilly R. and Müller F. Developmental Stages in Human Embryos. Contrib. Embryol., Carnegie Inst. Wash. 637 (1987).

The original 1987 publication text, figures and tables have been altered in formatting, addition of internal online links, and links to PubMed. Original Document - Copyright © 1987 Carnegie Institution of Washington.

See also the later 2010 paper by the same authors - O'Rahilly R & Müller F. (2010). Developmental stages in human embryos: revised and new measurements. Cells Tissues Organs (Print) , 192, 73-84. PMID: 20185898 DOI.

Links: Embryonic Development | Carnegie Collection | Carnegie Embryos | Ronan O'Rahilly | Fabiola Müller

1987 Stages: Introduction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | References | Appendix 1 | Appendix 2 | Historic Papers | Embryonic Development
Historic Disclaimer - information about historic embryology pages 
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Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

Appendix 1 | Appendix 2

Appendix 1 - Embryos In The Carnegie Collection

The Carnegie specimens of stages 2-23 are listed in the following tables.


In columns "Size" (stage 9 and later), E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion. In stages 16-18, an asterisk indicates a corrected or an estimated length. The grade refers to the total grade of the specimen and includes both its original quality and the condition of the mounted sections. The embedding medium was either paraffin (P) or a combination of celloidin and paraffin (C-P).


In stages 9-12 the number of paired somites is provided. In stage 18 the number of semicircular ducts (1-3) is given for each embryo, and also the length of the paramesonephric duct. Both of these serve as indices of relative level of development. In stages 19- 23 Streeter's point score, from which the position of a given Carnegie embryo within a stage can be determined, is included (see Introduction To Stages 19-23).


The donors of most of these valuable specimens were named by Streeter (1942-1951) and O'Rahilly (1973). All those of stages 2, 3, 5a, and 5b, most of those of stage 5c, and many of those of stages 6 and 7 were presented by Drs. Hertig and Rock, whose contribution has been of enormous value to early human embryology.

Carnegie Collection


The specimens in the excellent embryological collection of Professor E. Blechschmidt were assigned Carnegie Nos. 10315-10434 in 1972 because Professor Blechschmidt's wish was and is to have his collection combined with the Carnegie Collection. The Blechschmidt Collection is at present housed temporarily in the Department of Anatomy of Louisiana State University, New Orleans, and is under the care of Dr. Raymond F. Gasser. The collection has served as the basis of two important atlases (Blechschmidt, 1963, 1973), and the appropriate three-dimensional reconstructions are housed in the Anatomisches Institut der Universitat Gottingen. The staging of these embryos has not been completed and hence they are not included in the following lists.

Online Editor - The Blechschmidt Collection has subsequently been returned to Göttingen University. These embryos have been scanned as part of the Digital Embryology Consortium.

Stage 2

Serial No. Normality No. of Blastomeres Size of Fixed Specimen (µm) Fixative Embedding Medium Thinness (µm) Stain Year Notes
8190 abnormal 9 160x104 Alc. & Bouin C-P 6 Iron h., or G 1943 Hertig et al. (1954)
8260 in vitro 2 50x75 Bouin C-P 8 (Stain - Haematoxylin Eosin) 1944 Menkin and Rock (1948)
8450 abnormal 8 100x96 Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin), phlox. 1947 Hertig et al. (1954)
8452 abnormal 12 110x93 Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin), phlox. 1946 Hertig et al. (1954)
8500.1 in vitro 3 50x86 Bouin C-P 8 (Stain - Haematoxylin Eosin). 1947 Menkin and Rock (1948)
8630 abnormal 5 104x94 Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1948 Hertig et al. (1954)
8698 normal 2 122x88 Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1949 Hertig et al. (1954)
8904 normal 12 115 Bouin Specimen lost 1951 Hertig et al. (1954)

1987 - Stage 2 | Carnegie stage 2

Carnegie Collection - Stage 2 
Serial No. Normality No. of Blastomeres Size of Fixed Specimen (µm) Fixative Embedding Medium Thinness (µm) Stain Year Notes
8190 abnormal 9 160x104 Alc. & Bouin C-P 6 Iron h., or G 1943 Hertig et al. (1954)
8260 in vitro 2 50x75 Bouin C-P 8 (Stain - Haematoxylin Eosin) 1944 Menkin and Rock (1948)
8450 abnormal 8 100x96 Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin), phlox. 1947 Hertig et al. (1954)
8452 abnormal 12 110x93 Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin), phlox. 1946 Hertig et al. (1954)
8500.1 in vitro 3 50x86 Bouin C-P 8 (Stain - Haematoxylin Eosin) 1947 Menkin and Rock (1948)
8630 abnormal 5 104x94 Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1948 Hertig et al. (1954)
8698 normal 2 122x88 Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1949 Hertig et al. (1954)
8904 normal 12 115 Specimen lost 1951 Hertig et al. (1954)
Abbreviations
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • ? - unknown or not determined.

Stage 3

Serial No. Normality No. of Blastomeres Size of Fixed Specimen (µm) Fixative Embedding Medium Thinness (µm) Stain Year Notes
8663 normal 107 103x80 Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1949 Hertig et al. (1954)
8794 normal 58 108x86 Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1950 Hertig et al. (1954)
Carnegie Collection - Stage 3 
Serial No. Normality No. of Blastomeres Size of Fixed Specimen (µm) Fixative Embedding Medium Thinness (µm) Stain Year Notes
8663 normal 107 103x80 Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1949 Hertig etal.(1954)[1]
8794 normal 58 108x86 Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1950 Hertig etal.(1954)[1]
Abbreviations
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • ? - unknown or not determined.

1987 - Stage 3 | Carnegie stage 3

Stage 5

Stage 5a

Serial No. Grade Fixative Embedding Medium Thinness (µm) Stain Year Notes
8020 Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1942 Hertig and Rock (1945a)
8155 Exc. Bouin C-P 6 (Stain - Haematoxylin Eosin) 1943 Hertig and Rock (1949)
8225 Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1944 Hertig and Rock (1945b)


1987 - Stage 5a | 1987 - Stage 5 | Carnegie stage 5

Stage 5b

Serial No. Grade Fixative Embedding Medium Thinness (µm) Stain Year Notes
8004 Exc Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1942 Hertig and Rock (1945a)
8171 Exc Alc. C-P 6 (Stain - Haematoxylin Eosin) 1943 Hertig and Rock (1949)
8215 Exc Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1944 Hertig and Rock (1945c)
9350 Exc Bouin ? ? (Stain - Haematoxylin Eosin) 1955 Heuser (1956)


1987 - Stage 5b | 1987 - Stage 5 | Carnegie stage 5

Stage 5c

Serial No. Grade Fixative Embedding Medium Thinness (µm) Stain Year Notes
4900 Poor p P 10 p 1925 Incomplete. Streeter (1926)
7699 Exc. Bouin C-P 6 (Stain - Haematoxylin Eosin) 1939 Hertigand Rock (1941)
7700 Exc. Bouin C-P 6 (Stain - Haematoxylin Eosin) 1938 Hertigand Rock (1941)
7770 Exc. Bouin C-P 6 & 10 (Stain - Haematoxylin Eosin) 1940 Abnormal
7771 Exc. Bouin C-P 10 (Stain - Haematoxylin Eosin) 1940 Abnormal
7950 Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1941 Hertig and Rock (1944)
8000 Poor Alc. & Bouin C-P 8 (Stain - Haematoxylin Eosin) 1942 Abnormal
8139 Exc. ? C-P 6 (Stain - Haematoxylin Eosin) 1943 Incomplete. Marchetti (1945)
8299 Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin), phlox. 1945 Abnormal
8329 Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin), phlox. 1945 Abnormal
8330 Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin), phlox. 1945
8370 Poor Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin), phlox. 1946 Abnormal
8558 Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1947

1987 - Stage 5c | 1987 - Stage 5 | Carnegie stage 5


Carnegie Collection - Stage 5 
Serial No. Stage Grade Fixative Embedding Medium Thinness (µm) Stain Year Notes
8020 5a Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1942 Hertig and Rock (1945a)[2]
8155 5a Exc. Bouin C-P 6 (Stain - Haematoxylin Eosin) 1943 Hertig and Rock (1949)[3]
8225 5a Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1944 Hertig and Rock (1945b)[4]
8004 5b Exc Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1942 Hertig and Rock (1945a)[2]
8171 5b Exc Alc. C-P 6 (Stain - Haematoxylin Eosin) 1943 Hertig and Rock (1949)[3]
8215 5b Exc Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1944 Hertig and Rock (1945c)[5]
9350 5b Exc Bouin ? ? (Stain - Haematoxylin Eosin) 1955 Heuser (1956)[6]
4900 5c Poor p P 10 p 1925 Incomplete. Streeter (1926)[7]
7699 5c Exc. Bouin C-P 6 (Stain - Haematoxylin Eosin) 1939 Hertig and Rock (1941)[8]
7700 5c Exc. Bouin C-P 6 (Stain - Haematoxylin Eosin) 1938 Hertig and Rock (1941)[8]
7771 5c Exc. Bouin C-P 10 (Stain - Haematoxylin Eosin) 1940 Abnormal
7950 5c Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1941 Hertig and Rock (1944)[9]
8000 5c Poor Alc. & Bouin C-P 8 (Stain - Haematoxylin Eosin) 1942 Abnormal
8139 5c Exc. ? C-P 6 (Stain - Haematoxylin Eosin) 1943 Incomplete. Marchetti (1945)[10]
8299 5c Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin), phlox. 1945 Abnormal
8329 5c Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin), phlox. 1945 Abnormal
8330 5c Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin), phlox. 1945
8370 5c Poor Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin), phlox. 1946 Abnormal
8558 5c Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1947
Stage 5 was originally subdivided into 3 sequential parts a, b, c.

Abbreviations

  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • ? - unknown or not determined.
References
  1. 1.0 1.1 Hertig AT. Rock J. Adams EC. and Mulligan W.J. On the preimplantation stages of the human ovum: a description of four normal and four abnormal specimens ranging from the second to the fifth day of development. (1954) Carnegie Instn. Wash. Publ. 603, Contrib. Embryol., 35: 199-220.
  2. 2.0 2.1 Hertig AT. and Rock J. Two human ova of the pre-villous stage, having a developmental age of about seven and nine days respectively. (1945) Contrib. Embryol., Carnegie Inst. Wash. Publ. 557, 31: 65-84.
  3. 3.0 3.1 Hertig, A. T., and Rock, J. 1949. Two human ova of the pre-villous stage, having a developmental age of about eight and nine days respectively. Carnegie Instn. Wash. Publ. 583, Contrib. Embryol., 33, 169-186
  4. Hertig AT. and Rock J. On a normal human ovum not over 7.5 days of age. (1945) Anat. Rec. 91: 281.
  5. Hertig, A. T., and Rock J. 1945c. On a normal ovum of approximately 9 to 10 days of age. Anat. Rec, 91,281.
  6. Heuser, C. H. 1956. A human ovum with an estimated ovulation age of about nine days. Anat. Rec, 124, 459.
  7. Streeter, G. L. 1926. The "Miller" ovum—the youngest normal human embryo thus far known. Carnegie Instn. Wash. Publ 363, Contrib. Embryol., 18, 31-48.
  8. 8.0 8.1 Hertig, A. T., and Rock, J. 1941. Two human ova of the pre-villous stage, having an ovulation age of about eleven and twelve days respectively. Carnegie Instn. Wash. Publ. 525, Contrib. Embryol., 29, 127-156.
  9. Hertig, A. T., and Rock, J. 1944. On the development of the early human ovum, with special reference to the trophoblast of the previllous stage: a description of a normal and 5 pathologic human ova. Amer. J. Obstet Gynecol, 47, 149-184.
  10. Marchetti AA. A pre-villous human ovum accidentally recovered from a curettage specimen. (1945) Contrib. Embryol., Carnegie Inst. Wash. Publ. 557, 31: 107-115.


Stage 6

Serial No. Grade Fixative Embedding Medium Thinness (µm) Stain Year Notes
6026 Poor ? ? 6? H_&E 1929 Lockyer embryo. Abnormal. Ramsey (1937)
6734 Poor Zenker—acetic P 10 H.&E. 1934 Yale embryo. Ramsey (1938)
6900 Poor Formol P 15 H.&E. 1940 Linzenmeier (1914)
7634 Poor Formol P 10 H.&E. etc. 1940 Torpin embryo. Kraflca (1941)
7762 Good Zenker—formol P 8 ? 1940 Wilson (1945)
7800 Exc. ? C—P 8 H.&E. 1940 Abnormal
7801 Exc. Bouin C—P 8 H.&E. 1940 Heuser et al. (1945)
7850 Exc. Ale. & Bouin C—P 6 H.&E. 1940 Abnormal
8290 Exc. Bouin C—P 8 H. phlox. 1944
8360 Exc. Ale. & Bouin C—P 6 H&E., phlox. 1944
8362 Poor p C—P 6 H&E., phlox 1944
8672 Exc. Ale. & Bouin C—P 6 H&E. 1949
8819 Exc. Formol—chrom. subl. C—P 8 H.&E. 1951 Edwards—Jones—Brewer (H.I496). Brewer (1938)
8905 Poor Ale. p 6 H&E., phlox. 1951 Abnormal
8910 Good Formol C—P 8 H&E., phlox. 1951
9222 Good Bouin C—P 6 & 10 Azan 1954 Abnormal. Possibly stage 7
9250 Exc. Bouin p 8 H.&E. 1954
9595 Poor p p 8 H.&E. 1958
10003 Good Bouin p 5 Various 1963
Carnegie Collection - Stage 6 
Serial No. Grade Fixative Embedding Medium Thinness (µm) Stain Year Notes
6026 Poor ? ? 6? (Stain - Haematoxylin Eosin) 1929 Lockyer embryo. Abnormal. Ramsey (1937)
6734 Poor Zenker—acetic P 10 (Stain - Haematoxylin Eosin) 1934 Yale embryo. Ramsey (1938)
6900 Poor Formol P 15 (Stain - Haematoxylin Eosin) 1940 Linzenmeier (1914)
7634 Poor Formol P 10 (Stain - Haematoxylin Eosin) etc. 1940 Torpin embryo. Kraflca (1941)
7762 Good Zenker—formol P 8 ? 1940 Wilson (1945)
7800 Exc. ? C—P 8 (Stain - Haematoxylin Eosin) 1940 Abnormal
7801 Exc. Bouin C—P 8 (Stain - Haematoxylin Eosin) 1940 Heuser et al. (1945)
7850 Exc. Alc. & Bouin C—P 6 (Stain - Haematoxylin Eosin) 1940 Abnormal
8290 Exc. Bouin C—P 8 H. phlox. 1944
8360 Exc. Alc. & Bouin C—P 6 (Stain - Haematoxylin Eosin), phlox. 1944
8362 Poor p C—P 6 (Stain - Haematoxylin Eosin), phlox 1944
8672 Exc. Ale. & Bouin C—P 6 (Stain - Haematoxylin Eosin) 1949
8819 Exc. Formol—chrom. subl. C—P 8 (Stain - Haematoxylin Eosin) 1951 Edwards-Jones-Brewer (H1496). Brewer (1937, 38)[1][2]
8905 Poor Ale. p 6 (Stain - Haematoxylin Eosin), phlox. 1951 Abnormal
8910 Good Formol C—P 8 (Stain - Haematoxylin Eosin), phlox. 1951
9222 Good Bouin C—P 6 & 10 Azan 1954 Abnormal. Possibly stage 7
9250 Exc. Bouin p 8 (Stain - Haematoxylin Eosin) 1954
9595 Poor p p 8 (Stain - Haematoxylin Eosin) 1958
10003 Good Bouin p 5 Various 1963
Abbreviations
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • ? - unknown or not determined.
References

1987 - Stage 6 | Carnegie stage 6

Stage 7

Serial No. Grade Fixative Embedding Medium Thinness (µm) Stain Year Notes
7802 Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1940 Heuser et al. (1945)
8206 Good p C-P 6 (Stain - Haematoxylin Eosin) 1943
8361 Good Bouin C-P 10 p 1946 Abnormal
8602 Exc. Alc. C-P 8 (Stain - Haematoxylin Eosin) 1948
8752 Exc. ? C-P 10 (Stain - Haematoxylin Eosin) 1950
8756 Exc. Formol C-P 10 (Stain - Haematoxylin Eosin) 1950
9217 Exc. p P 10 (Stain - Haematoxylin Eosin) 1954

1987 - Stage 7 | Carnegie stage 7

Carnegie Collection - Stage 7 
Serial No. Grade Fixative Embedding Medium Thinness (µm) Stain Year Notes
7802 Exc. Alc. & Bouin C-P 6 (Stain - Haematoxylin Eosin) 1940 Heuser et al. (1945)
8206 Good p C-P 6 (Stain - Haematoxylin Eosin) 1943
8361 Good Bouin C-P 10 p 1946 Abnormal
8602 Exc. Alc. C-P 8 (Stain - Haematoxylin Eosin) 1948
8752 Exc. ? C-P 10 (Stain - Haematoxylin Eosin) 1950
8755 Exc. Formol C-P 10 (Stain - Haematoxylin Eosin) 1950
9217 Exc. p P 10 (Stain - Haematoxylin Eosin) 1954
Abbreviations
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • ? - unknown or not determined.


Stage 8

Serial No. Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
1399 Poor Formol P Trans. 10 (Stain - Haematoxylin Eosin) etc. 1916 "Mateer embryo" described by Streeter (1920a)
3412 Poor Formol P Trans. 5-15 Al. coch. E. au., or. 1921
5960 Good Kaiserling P Trans. 5 Al. coch. & eosin 1929 Heuser (1932b)
6630 Poor Formol P Oblique 6 (Stain - Haematoxylin Eosin) 1932
6815 Poor Formol P Oblique 10 Al. coch., or. G 1933
7170a and b 7545 Poor Alc. C-P Trans. 6 (Stain - Haematoxylin Eosin) 1935 Twins
7568 Poor Formoi C-P Trans. 6 (Stain - Haematoxylin Eosin) 1938
7640 Good Formol & Bouin P Trans. 10 (Stain - Haematoxylin Eosin) 1939 George (1942)
7666 Exc. Formol-chrom. subl. C-P Trans. 6 (Stain - Haematoxylin Eosin) 1939 "H. 1515"
7701 Exc. ? C-P Trans. 8 (Stain - Haematoxylin Eosin) 1939
7822 Good Formoi C-P Trans. 10 (Stain - Haematoxylin Eosin) 1940
7949 Good Zenker p Sag. 10 (Stain - Haematoxylin Eosin) etc. 1941
7972 Good Alc. & Bouin C-P Sag. 6 (Stain - Haematoxylin Eosin) 1942
8255 Exc. Bouin C-P Sag. 8 (Stain - Haematoxylin Eosin), phlox. 1944 Slides showing embryo returned to Dr. Patten in 1962
8320 Good Formol C-P Sag. 8 (Stain - Haematoxylin Eosin), phlox. 1945
8352 Good Formol C-P Trans. 8 (Stain - Haematoxylin Eosin), phlox. 1946
8371 Poor Alc. & Bouin C-P Sag. 8 (Stain - Haematoxylin Eosin), phlox. 1946
8671 Exc. Alc. & Bouin C-P Sag. 6 (Stain - Haematoxylin Eosin), phlox. 1949
8725 Exc. Alc. & Bouin C-P Sag. 6 (Stain - Haematoxylin Eosin), phlox. 1949
8727 Exc. Alc. & Bouin C-P Trans. 8 (Stain - Haematoxylin Eosin), phlox. 1949 Germ disc folded, possibly double (Hertig, 1968, fig. 180)
8820 Good Zenker-formol ? Trans. 10 (Stain - Haematoxylin Eosin) 1951 "Jones-Brewer I" (H. 1459) described byJones and Brewer (1941)
9009a and b 9123 Good Formol C-P Sag. 6 (Stain - Haematoxylin Eosin) 1952 Twins described briefly by Heuser (1954)
9123 Good Formol C-P Sag. 6 (Stain - Haematoxylin Eosin) 1953
9251 Good ? C-P Sag. 10-12 Azan, H. & phlox. 1954
9286 Exc. Formol C-P Trans. 8 Azan 1955
10157 Exc. Formol C-P Trans. ? Cason 1967
10174 Exc. Bouin p Trans. 8 Cason 1967

1987 - Stage 8 | Carnegie stage 8

Carnegie Collection - Stage 8 
Serial No. Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
1399 Poor Formol P Transverse 10 (Stain - Haematoxylin Eosin) etc. 1916 "Mateer embryo" described by Streeter (1920a)[1]
3412 Poor Formol P Transverse 5-15 Al. coch. E. au., or. 1921
5960 Good Kaiserling P Transverse 5 Al. coch. & eosin 1929 Heuser (1932b)[2]
6630 Poor Formol P Oblique 6 (Stain - Haematoxylin Eosin) 1932
6815 Poor Formol P Oblique 10 Al. coch., or. G 1933
7170a and b 7545 Poor Alc. C-P Transverse 6 (Stain - Haematoxylin Eosin) 1935 Twins
7568 Poor Formoi C-P Transverse 6 (Stain - Haematoxylin Eosin) 1938
7640 Good Formol & Bouin P Transverse 10 (Stain - Haematoxylin Eosin) 1939 George (1942)[3]
7666 Exc. Formol-chrom. subl. C-P Transverse 6 (Stain - Haematoxylin Eosin) 1939 "H. 1515"
7701 Exc. ? C-P Transverse 8 (Stain - Haematoxylin Eosin) 1939
7822 Good Formoi C-P Transverse 10 (Stain - Haematoxylin Eosin) 1940
7949 Good Zenker p Sagittal 10 (Stain - Haematoxylin Eosin) etc. 1941
7972 Good Alc. & Bouin C-P Sagittal 6 (Stain - Haematoxylin Eosin) 1942
8255 Exc. Bouin C-P Sagittal 8 (Stain - Haematoxylin Eosin), phlox. 1944 Slides showing embryo returned to Dr. Patten in 1962
8320 Good Formol C-P Sagittal 8 (Stain - Haematoxylin Eosin), phlox. 1945
8352 Good Formol C-P Transverse 8 (Stain - Haematoxylin Eosin), phlox. 1946
8371 Poor Alc. & Bouin C-P Sagittal 8 (Stain - Haematoxylin Eosin), phlox. 1946
8671 Exc. Alc. & Bouin C-P Sagittal 6 (Stain - Haematoxylin Eosin), phlox. 1949
8725 Exc. Alc. & Bouin C-P Sagittal 6 (Stain - Haematoxylin Eosin), phlox. 1949 Preparation method described by Heard (1957)[4]
8727 Exc. Alc. & Bouin C-P Transverse 8 (Stain - Haematoxylin Eosin), phlox. 1949 Germ disc folded, possibly double (Hertig, 1968, fig. 180)[5]
8820 Good Zenker-formol ? Transverse 10 (Stain - Haematoxylin Eosin) 1951 "Jones-Brewer I" (H. 1459) described by Jones and Brewer (1941)[6]
9009a and b 9123 Good Formol C-P Sagittal 6 (Stain - Haematoxylin Eosin) 1952 Twins described briefly by Heuser (1954)[7]
8371 Good Formol C-P Sagittal 6 (Stain - Haematoxylin Eosin) 1953
9251 Good ? C-P Sagittal 10-12 Azan, H. & phlox. 1954
9286 Exc. Formol C-P Transverse 8 Azan 1955
10157 Exc. Formol C-P Transverse ? Cason 1967
10174 Exc. Bouin p Transverse 8 Cason 1967
Abbreviations
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • ? - unknown or not determined.
References
  1. Streeter GL. A human embryo (Mateer) of the pre-somite period. (1920) Contrib. Embryol., Carnegie Inst. Wash. Publ. 272, 9: 389-424.
  2. Heuser, C. H. 1932b. A presomite human embryo with a definite chorda canal. Carnegie Instn. Wash. Publ. 433, Contrib. Embryol., 23, 251-267.
  3. George, W. C. 1942. A presomite human embryo with chorda canal and prochordal plate. Carnegie Instn. Wash. Publ. 541, Contrib. Embryol., 30, 1-7.
  4. Heard OO. Methods used by C. H. Heuser in preparing and sectioning early embryos. (1957.) Carnegie Instn. Wash. Publ. 611, Contrib. Embryol., 36, 1-18.
  5. Hertig, A. T. 1968. Human Tropboblast. Thomas, Springfield, Illinois.
  6. Jones HO. and Brewer JI. A human embryo in the primitive-streak stage (Jones-Brewer ovum I). (1941) Carnegie Instn. Wash. Publ. 525, Contrib. Embryol., 29: 157-165.
  7. Heuser, C. H. 1954. Monozygotic twin human embryos with an estimated ovulation age of 17 days. Anat. Rec, 118, 310.

Stage 9

Serial No. Pairs of somites Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
1878 2-3 E., 1.38
Ch., 12X10.5X7.5
Good Formol P Cor. 10 (Stain - Haematoxylin Eosin) 1917 Described by Ingalls (1920)
5080 1 E., 1.5
Ch., 14.5
Poor Formol P Trans. 10 Al. coch. 1926 Studied by Davis (1927)
7650 2-3 E., 2-3 Good Alc & Bouirl C-P Trans. 6 (Stain - Haematoxylin Eosin) 1939 Said to be female (Park, 1957)

1987 - Stage 9 | Carnegie stage 9

Carnegie Collection - Stage 9 
Serial No. Pairs of somites Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
1878 2-3 Embryo, 1.38
Ch., 12x10.5x7.5
Good Formalin P Coronal 10 (Stain - Haematoxylin Eosin) 1917 Described by Ingalls (1920).[1]
5080 1 Embryo, 1.5
Ch., 14.5
Poor Formalin P Transverse 10 Al. coch. 1926 Studied by Davis (1927).[2]
7650 2-3 Embryo, 2-3 Good Alc & Bouin C-P Transverse 6 (Stain - Haematoxylin Eosin) 1939 Said to be female[3]
Abbreviations
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • ? - unknown or not determined.
References
  1. Ingalls, N.W. 1920. A human embryo at the beginning of segmentation, with special reference to the vascular system. Carnegie Instn. Wash. Publ. 274, Contrib. Embryol., 11, 61-90.
  2. Davis, C. L. 1927. Development of the human heart from its first appearance to the stage found in embryos of twenty paired somites. Carnegie Instn. Wash. Publ 380, Contrib. Embryol., 19, 245-284.
  3. PARK WW. (1957). The occurrence of sex chromatin in early human and macaque embryos. J. Anat. , 91, 369-73. PMID: 13448995

Stage 10

All sections at stage 10 are transverse

Serial No. Pairs of somites Size (mm) Grade Fixative Embedding Medium Thinness (µm) Stain Year Notes
391 8 E, 2 Ch., 14 Good Formol P 10 Al. coch. 1907 Monograph by Dandy (1910)
1201 7 E,2 Ch.. 144 Good Formol P 8 H. & or. G. 1915 Univ. Chicago No. H 87
2795 4-5 E,2 Poor Alc. P 6 Alcoch,or.G. 1919
3707 12 E, 1 5 Good Formol P 12.5 I. H. 1921 Univ. Calif. No. H 197
3709 4 E. 1.4 Ch.. 14.8 Poor Formol P 10 Erythrosin 1921 Univ. Chicago No H 279
3710 12 E., 3.6 Ch., 19.0 Good Formol C-P 10 H. & or. G. 1921 Univ. Chicago No. H 392
4216 8 E, 2 Ch, 9.8 Good Formol P 15 ? 1923 Monograph by Payne (1925)
5074 10 E., 3.3 Ch., 10.8 Exc. Bouin P 10 Al. coch. 1925 Univ. Rochester No. H 10. Monograph by Corner (1929)
6330 7 E, 2.83 Good P 5 Ehr. H. 1931 Univ. Chicago No. H 1404
6740 12 E., 2.2 Good p C-P 8 ? 1933 Litzenberg embryo. Studied by Boyden (1940)
7251 8 E., 1.27 Good Formol C-P 10 (Stain - Haematoxylin Eosin) 1941 "Singapore embryo." Univ. Cambridge No. H 98. Studied by Wilson (1914)
8244 6 E., 1.55 Ch, 8,5 Good Alc. C-P 8 (Stain - Haematoxylin Eosin) phlox. 1944
8970 12 Ch, ca. 8 Good Zenker P 5 Various, chiefly carmine 1952 Univ. Chicago. No. H 637. Dicephaly

1987 - Stage 10 | Carnegie stage 10

Carnegie Collection - Stage 10 
Serial No. Pairs of somites Size (mm) Grade Fixative Embedding Medium Thinness (µm) Stain Year Notes
391 8 E, 2 Ch., 14 Good Formalin P 10 Al. coch. 1907 Monograph by Dandy (1910)[1]
1201 7 E,2 Ch.. 144 Good Formalin P 8 H. & or. G. 1915 Univ. Chicago No. H 87
2795 4-5 E,2 Poor Alc. P 6 Al coch,or.G. 1919
3707 12 E, 1 5 Good Formalin P 12.5 I. H. 1921 Univ. Calif. No. H 197
3709 4 E. 1.4 Ch.. 14.8 Poor Formalin P 10 Erythrosin 1921 Univ. Chicago No H 279
3710 12 E., 3.6 Ch., 19.0 Good Formalin C-P 10 H. & or. G. 1921 Univ. Chicago No. H 392
4216 8 E, 2 Ch, 9.8 Good Formalin P 15 ? 1923 Monograph by Payne (1925)[2]
5074 10 E., 3.3 Ch., 10.8 Exc. Bouin P 10 Al. coch. 1925 Univ. Rochester No. H 10. Monograph by Corner (1929)[3]
6330 7 E, 2.83 Good P 5 Ehr. H. 1931 Univ. Chicago No. H 1404
6740 12 E., 2.2 Good p C-P 8 ? 1933 Litzenberg embryo. Studied by Boyden (1940)
7251 8 E., 1.27 Good Formalin C-P 10 (Stain - Haematoxylin Eosin) 1941 "Singapore embryo." Univ. Cambridge No. H 98.
Studied by Wilson (1914)[4]
8244 6 E., 1.55 Ch, 8,5 Good Alc. C-P 8 (Stain - Haematoxylin Eosin) phlox. 1944
9870 12 Ch, ca. 8 Good Zenker P 5 Various, chiefly carmine 1952 Univ. Chicago. No. H 637. Dicephaly
Abbreviations
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • ? - unknown or not determined.
  • All Carnegie stage 10 embryos are cut in Transverse plane.

Stage 11

Serial No. Pairs of somites Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
12 14 E, 2.1 Ch, 13 Poor P Trans. 10 Al. carm. 1893
164 18 E, 3.5 Ch, 14 Good Formol P Trans. 20 Al. carm. 1913
318 13/14 E, 2.5 Ch, 16 Good P Trans. 25 Al. carm. 1905
470 17 E, 4.3 Ch, 16 Good Formol P Trans. 10 Al. carm. 1910
779 14 E, 2.75 Good C Trans. 15 Al. coch. 1913 Complete dysraphia. Studied by Dekaban and Bartelmez (1964)
1182b E, 3 Ch, 15x12x5 Good Formol ? Trans. 20 Al. carm. 1915
2053 20 E, 3.1 Ch, 12 Exc. Formol P Trans. 10 Al. coch. 1918 Most advanced in group. Monograph by Davis (1923). Ag added to slide 2
4315 17 E, 4.7 Ch, 23x10.4X11 Exc. ? C-P Trans. 10 I.H. & E. 1923 Univ. Chicago No. 951. Studied by Wen (1928)
4529 14 E, 2.4 Ch, 21 Exc. Formol P Trans. 10 Al. coch, or. G. 1924 Monograph by Heuser (1930)
4783 13 E, 2.3 Fair ? ? Trans. 5 I.H. 1924 Monograph by Wallin (1913)
4877 13 E, 2 Ch, 15 Good Formol P Trans. 15 Al. coch. 1925
5072 17 E, 3 Good Formol P Trans. 10 (Stain - Haematoxylin Eosin) 1925 Tubal. Type specimen. Monograph by Atwell (1930)
6050 19/21 E.,3 Ch, 10 Good Formol C-P Cor. 10 Al. coch. 1930 Advanced
6344 13 E, 2.5 Ch, 17 Exc. Formol C-P Trans 6 Al. coch. 1931 Least advanced in group
6784 17 E, 5 Ch, 16 Exc. Formol C-P Trans 6 I.H, or. G. 1933
7358 16 E, ? Ch, 15 Poor Alc, formol p Oblique 25 (Stain - Haematoxylin Eosin) 1936
7611 16 E., 2.4 Ch., 12 Exc. Bouin C-P Trans 8 (Stain - Haematoxylin Eosin) 1938
7665 19 E., 4.36 Exc. ? C-P Trans 6 1939 Univ. Chicago No. H 1516
7702 17 E, 3.7 Ch., 14 Good Formol C-P Trans 10 Al. coch. 1940 Returned to B M Patten
7851 13 E., 4.3 Ch, 18 Exc. Formol C-P Trans 8 (Stain - Haematoxylin Eosin) 1940 Slightly injured
8005 16/17 E, 3 Exc. Bouin C-P Trans 8 (Stain - Haematoxylin Eosin) 1942 Tubal.
8116 17 E, 14 Ch.. 17 Good Formol p Sag. 8 Azan 1953
8962 15 E, 1.55 Good ? * Sag. ? ? 1952 Tubal. I'ntv Chicago No H 810
Carnegie Collection - Stage 11 
Serial No. Pairs of somites Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
12 14 E, 2.1 Ch, 13 Poor P Transverse 10 Al. carm. 1893
164 18 E, 3.5 Ch, 14 Good Formalin P Transverse 20 Al. carm. 1913
318 13/14 E, 2.5 Ch, 16 Good P Transverse 25 Al. carm. 1905
470 17 E, 4.3 Ch, 16 Good Formalin P Transverse 10 Al. carm. . 1910
779 14 E, 2.75 Good C Transverse 15 Al. coch. 1913 Dysraphism. Noted by Dekaban (1964)[5]
1182b E, 3 Ch, 15x12x5 Good Formalin ? Transverse 20 Al. carm. 1915
2053 20 E, 3.1 Ch, 12 Exc. Formalin P Transverse 10 Al. coch. 1918 Most advanced in group. Ag added to slide 2
Monographs by Davis (1923)[6] and Congdon (1922)[7]
4315 17 E, 4.7 Ch, 23x10.4X11 Excellent ? C-P Transverse 10 I.H. & E. 1923 Univ. Chicago No. 951. Wen (1928)[8]
4529 14 E, 2.4 Ch, 21 Excellent Formalin P Transverse 10 Al. coch, or. G. 1924 Heuser (1930)[9]
4783 13 E, 2.3 Fair ? ? Transverse 5 I.H. 1924 Wallin (1913)[10]
4877 13 E, 2 Ch, 15 Good Formalin P Transverse 15 Al. coch. 1925
5072 17 E, 3 Good Formalin P Transverse 10 (Stain - Haematoxylin Eosin) 1925 Tubal Type specimen. Atwell (1930)[11]
6050 19/21 E.,3 Ch, 10 Good Formalin C-P Coronal 10 Al. coch. 1930 Advanced
6344 13 E, 2.5 Ch, 17 Excellent Formalin C-P Transverse 6 Al. coch. 1931 Least advanced in group
6784 17 E, 5 Ch, 16 Excellent Formalin C-P Transverse 6 I.H, or. G. 1933
7358 16 E, ? Ch, 15 Poor Alc, formol p Oblique 25 (Stain - Haematoxylin Eosin) 1936
7611 16 E., 2.4 Ch., 12 Excellent Bouin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1938
7665 19 E., 4.36 Excellent ? C-P Transverse 6 1939 Univ. Chicago No. H 1516
7702 17 E, 3.7 Ch., 14 Good Formalin C-P Transverse 10 Al. coch. 1940 Returned to B M Patten
7851 13 E., 4.3 Ch, 18 Excellent Formalin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1940 Slightly injured
8005 16/17 E, 3 Excellent Bouin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1942 Tubal
8116 17 E, 14 Ch.. 17 Good Formalin p Sagittal 8 Azan 1953
8962 15 E, 1.55 Good ? * Sagittal ? ? 1952 Tubal Univ. Chicago No. H 810
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • ? - unknown or not determined.
References
  1. Dandy WE. A human embryo with seven pairs of somites measuring about 2 mm in length. (1910) Amer. J Anat. 10: 85-109.
  2. Payne, F. 1925. General description of a 7-somite human embryo. Carnegie Instn. Wash. Publ. 361, Contrib. Embryol., 16,115-124.
  3. Corner GW. A well-preserved human embryo of 10 somites. (1929) Contrib. Embryol., Carnegie Inst. Wash. Publ. 394, 20:81-102.
  4. Wilson JT. Observations upon young human embryos. (1914) J Anat Physiol., 48(3): 315-51 PMID 17233002 PMC1288949
  5. Dekaban AS. and Bartelmez GW. Complete Dysraphism in 14 Somite Human Embryo. (1964) A Contribution To Normal And Abnormal Morphogenesis. Am. J. Anat. 115: 27-38. PMID 14199785
  6. Davis CL. Description of a human embryo having twenty paired somites. (1923) Carnegie Instn. Wash. Publ. 332, Contrib. Embryol., 15: 1-51.
  7. Congdon ED. Transformation of the aortic-arch system during the development of the human embryo. (1922) Contrib. Embryol., Carnegie Inst. Wash. Publ 277, 14:47-110.
  8. Wen IC. The anatomy of human embryos with seventeen to twenty-three pairs of somites (1928) J. Comp. Neural., 45: 301-376.
  9. Heuser CH. A human embryo with 14 pairs of somites. (1930) Carnegie Instn. Wash. Publ. 414, Contrib. Embryol., Carnegie Inst. Wash. 22:135-153.
  10. Wallin IE. A human embryo of thirteen somites. (1913) Amer. J Anat. 15(3): 319-331.
  11. Atwell WJ. A human embryo with seventeen pairs of somites. (1930) Contrib. Embryol., Carnegie Inst. Wash. Publ. 407, 21: 1-24.

1987 - Stage 11 | Carnegie stage 11

Stage 12

Serial No. Pairs of somites Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
209 ca_24 EH3 Ch.,15 Poor Alc P Cor. 50 Al. coch. 1902
250 19? E , 2 (11, 10x9x9 Poor p ? Sag. 20 Al. coch. p
384 P E 2_5 Ch.,13 Poor Formol P Trans. 10 H.&E. 1907 Macerated. Narrow yolk stalk
486 21 E.,4 Ch., 22 Good Corros. acetic P Trans. 10 Al. Coch. 1911
1062 29 E.,4.5 Ch., 20 Good Formol P Trans. 20 Al. coch. 1915 Transitional to next stage
2197 ? E_,5_3 Ch., 19.5 Poor Formol P Trans. 10 Al. coch, or. G. 1918
4245-7 ca.24 E.,3.5 Ch., 24 Good Alc, formol P Trans. 10 Al. coch. 1923 Caudal neuropore widely open
4479 P E.,5 .8 Ch , 17 Poor Formol P Trans. 40 Al. coch. 1923 Macerated. Upper lirnb buds not visible
4736 26 E.,3.0 Ch.,20 Good Formol P Cor. 10 Al. coch. 1924 No upper limb buds. Caudal neuropore closed
4759 ? E.,4.5 Ch.,15 Good Formol P Trans. 15 H.&E. 1924 Neural tube folded
4784 23 E_,3 Good P P Trans. 10 p 1924
5035 25-28 E.,3.8 Ch.,18 Good Formol C-P Trans. 10 Al. coch. 1925
5048 ca_25 E_,3_5 Good Formol C-P Trans. 10 Al. coch. 1925 Tubal. Injured
5056 25 E,,3 Ch.,12 Good Formol P Trans. 10 Al. coch. 1925
5206 ? E.,4 Ch., 51x31x30 Poor ?? P Trans. 20 Al. coch. 1926 Tubal
5300 ? E., 4.5 Ch,16.5 Poor Formol P Trans. 20 Al. coch. 1926 Autopsy. Partly macerated
5923 28 E.,4 Ch.,15 Exc. Formol P Trans. 10 Al. coch. 1929
6097 25 E,3.4 Ch., 12.5 Exc. Formol C-P Trans. 10 Al. coch, eosin 1930 Tubal. Ag added to slides 1-3
6144 27 E. 3.3 Ch.,11 Good Lysol—Zenker C—P Trans. 10 Al. coch. 1930
6488 28 E, 32 Ch,22 Good Formol C—P Trans. 10 Al. coch. 1932
6937 26 E.,3 Ch , 12 Poor Formol C—P Cor. 10 I.H.,or.G. 1934 Tubal. Caudal neuropore closed
7724 ca.29 E,3.5 Ch.,18 Good Formol C—P Sag. 8 H.&E. 1940 Caudal end broken
7852 25 E , 3.7 Ch,26 Exc. Formol C—P Trans. 10 H.&E. 1940 Typical for stage 12
7999 ca.28 E,3.2 Ch , 15 Exc. Bruin C-P Trans. 10 H.&E. 1942 Caudal defect
8505a 24 Ch, 23.5 Exc. Formol C-P Trans. P H. Phlox. 1947
8505b 23 Ch,24 Exc. Formol C-P Sag. p Azan 1947 Twins
8941 28 E,4.9 Ch, 35 Exc. Zenker C-P Trans. 6 I.H. 1927 Univ. Chicago No. H 1261
8942 25 E, 38 Ch, 35 Exc. Formal-Zenker C-P Cor. 5 11-1. 1930 Univ. Chicago No. H 1382
8943 22 E. 3.9 Ch, 20.4 Exc. Formal-Zenker C-P Trans. 8 H.&E. 1934 Univ. Chicago No. H 1481
8944 25 E,4 Ch,,25 Exc. Formal-Zenker C-P Sag. 8 I.H. 1936 Univ. Chicago No. H 1514
8963 22 E, 3.8 Ch , 14.5 Fair Formol C-P Trans 10 I.H. 1928 Univ. Chicago. No. H 1093 Studied by Wen (1928)[1]
8964 23 E,2.8 Ch - 25 Poor Formol p Trans 8 I.H. 1928 Univ. Chicago No. H984 Studied by Wen (1928)[1]
9154 24 E, 5 4 Exc Formal C-P Trans I.H. & phlox. 1953
Carnegie Collection Embryos - Stage 12 
Serial No. Pairs of somites Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
209 ca_24 EH3 Ch.,15 Poor Alc P Coronal 50 Al. coch. 1902
250 19? E , 2 (11, 10x9x9 Poor p ? Sagittal 20 Al. coch. p
384 P E 2_5 Ch.,13 Poor Formalin P Transverse 10 H.&E. 1907 Macerated. Narrow yolk stalk
486 21 E.,4 Ch., 22 Good Corros. acetic P Transverse 10 Al. Coch. 1911
1062 29 E.,4.5 Ch., 20 Good Formalin P Transverse 20 Al. coch. 1915 Transitional to next stage
2197 ? E_,5_3 Ch., 19.5 Poor Formalin P Transverse 10 Al. coch, or. G. 1918
4245-7 ca.24 E.,3.5 Ch., 24 Good Alc, formol P Transverse 10 Al. coch. 1923 Caudal neuropore widely open
4479 P E.,5 .8 Ch , 17 Poor Formalin P Transverse 40 Al. coch. 1923 Macerated. Upper lirnb buds not visible
4736 26 E.,3.0 Ch.,20 Good Formalin P Coronal 10 Al. coch. 1924 No upper limb buds. Caudal neuropore closed
4759 ? E.,4.5 Ch.,15 Good Formalin P Transverse 15 (Stain - Haematoxylin Eosin) 1924 Neural tube folded
4784 23 E_,3 Good P P Transverse 10 p 1924
5035 25-28 E.,3.8 Ch.,18 Good Formalin C-P Transverse 10 Al. coch. 1925
5048 ca_25 E_,3_5 Good Formalin C-P Transverse 10 Al. coch. 1925 Tubal Injured
5056 25 E,,3 Ch.,12 Good Formalin P Transverse 10 Al. coch. 1925
5206 ? E.,4 Ch., 51x31x30 Poor ?? P Transverse 20 Al. coch. 1926 Tubal
5300 ? E., 4.5 Ch,16.5 Poor Formalin P Transverse 20 Al. coch. 1926 Autopsy. Partly macerated
5923 28 E.,4 Ch.,15 Exc. Formalin P Transverse 10 Al. coch. 1929
6097 25 E,3.4 Ch., 12.5 Exc. Formalin C-P Transverse 10 Al. coch, eosin 1930 Tubal Ag added to slides 1-3
6144 27 E. 3.3 Ch.,11 Good Lysol—Zenker C—P Transverse 10 Al. coch. 1930
6488 28 E, 32 Ch,22 Good Formalin C—P Transverse 10 Al. coch. 1932
6937 26 E.,3 Ch , 12 Poor Formalin C—P Coronal 10 I.H.,or.G. 1934 Tubal Caudal neuropore closed
7724 ca.29 E,3.5 Ch.,18 Good Formalin C—P Sagittal 8 (Stain - Haematoxylin Eosin) 1940 Caudal end broken
7852 25 E , 3.7 Ch,26 Exc. Formalin C—P Transverse 10 (Stain - Haematoxylin Eosin) 1940 Typical for stage 12
7999 ca.28 E,3.2 Ch , 15 Exc. Bouin C-P Transverse 10 (Stain - Haematoxylin Eosin) 1942 Caudal defect
8505a 24 Ch, 23.5 Exc. Formalin C-P Transverse P H. Phlox. 1947
8505b 23 Ch,24 Exc. Formalin C-P Sagittal p Azan 1947 Twins
8941 28 E,4.9 Ch, 35 Exc. Zenker C-P Transverse 6 I.H. 1927 Univ. Chicago No. H 1261
8942 25 E, 38 Ch, 35 Exc. Formal-Zenker C-P Coronal 5 11-1. 1930 Univ. Chicago No. H 1382
8943 22 E. 3.9 Ch, 20.4 Exc. Formal-Zenker C-P Transverse 8 H.&E. 1934 Univ. Chicago No. H 1481
8944 25 E,4 Ch,,25 Exc. Formal-Zenker C-P Sagittal 8 I.H. 1936 Univ. Chicago No. H 1514
8963 22 E, 3.8 Ch , 14.5 Fair Formalin C-P Transverse 10 I.H. 1928 Univ. Chicago. No. H 1093 Studied by Wen (1928)[1]
8964 23 E,2.8 Ch - 25 Poor Formalin p Transverse 8 I.H. 1928 Univ_ Chicago No. H984 Studied by Wen (1928)[1]
9154 24 E, 5 4 Exc Formalin C-P Transverse I.H. & phlox. 1953
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • ? - unknown or not determined.
References

1987 - Stage 12 | Carnegie stage 12

Stage 13

Carnegie Collection Embryos - Stage 13 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
1 E.,4.5 Ch., 30x30 Poor Salicylic acid P Transverse 10 Hemat. 1887 Obtained by Mall while student
19 E., 5.5 Ch., 18x14 Poor p ? Transverse 20 Al. coch. 1895
98 E., 4 Ch., 24x16x9 Poor p P Transverse 20 Al. coch. 1896
76 E., 4.5 Ch., 22x20 Poor Alc. P Transverse 20 Al. coch. 1897
112 E., 4 Poor p P Sagittal 10 Al. coch. p
116 E., 5 Poor p ? Sagittal 10 Al. coch. 1898
148 E.,4.3 Ch., 17x14x10 Poor Alc. P Coronal 10 (Stain - Haematoxylin Eosin) 1899 Abnormal. Nasal discs fused
186 E.,3.5 Ch., 25x20x15 Poor Alc. P Transverse 20 Al. coch. 1901
239 E., 3.0 Poor Formol P Transverse 10 (Stain - Haematoxylin Eosin) 1903
248 E., 4.5 Ch., 30x23x15 Poor p ? Coronal 50 Al. coch. 1904
407 E.,4 Ch., 14x13X7 Poor Formol ? Transverse 40 Al. coch. 1907
463 E., 3.9 Ch., 17x12x7 Good Formol P Coronal 10 Al. coch. 1910
523 E., 5 Ch., 25x25x15 Fair Formol P Transverse p Al. coch. 1911
588 E., 4.0 Ch., 19x15x8 Good Corros. acetic P Coronal 15 (Stain - Haematoxylin Eosin) 1912 Advanced
786 E., 4.5 Ch., 19x10x10 Poor Alc. P Sagittal 15 Al. coch. 1913
800 E., 6.0 Good Corros. acetic P Transverse 10 H 1913 Curettage. Anencephaly
808 E.,4.0 Poor Corros. acetic P Transverse 15 Al. coch. 1914 Tubal Incomplete
826 E., 5.0 Ch., 13x13x9 Good Formol P Transverse 20 Al. coch. 1914 Shrunken
836 E.,4.0 Ch., 22x18x11 Exc. Corros. acetic P Transverse 15 Al. coch. 1914 Less advanced
963 E.,4.0 Ch., 23x18x16 Good Formol P Coronal 20 Al. coch. 1914
1075 E.,6.0 Ch., 46x32x20 Exc. Corros. acetic P Coronal 20 (Stain - Haematoxylin Eosin) or. G. 1915 Most advanced in group
3956 E., 4.0 Poor Formol P Transverse 20 Al. coch. 1922 Tubal Incomplete
4046 E.,5 Ch., 22x20x20 Poor Formol P Transverse 50 Al. coch. 1922
5541 E., 6.0 Ch., 35x30x20 Good Formol P Transverse 10 Al. coch., eosin 1927
5682 E., 5.3 Ch., 29x25x13 Poor Formol P Coronal 20 Al. coch. 1928
5874 E., 4.8 Exc. Bouin P Transverse 10 (Stain - Haematoxylin Eosin) 1929 Hysterotomy. Bromides only
6032 E., 5.8 Ch., 30x24x13 Poor Formol P P ? p 1929 Not good enough to cut
6469 E., 5.0 Ch., 25x18x18 Poor Formol P P P P 1932 Fragmented on cutting. Not saved
6473 E., 5.0 Ch, 30x30x15 Exc. Formol C-P Coronal 6 Al. coch. 1932 Less advanced. Ag added
7433 E., 5.2 Ch., 15x13x13 Exc. Formol C-P Coronal 8 (Stain - Haematoxylin Eosin) 1937 Tubal
7618 E, 48 Ch, 18x15x15 Exc. Bouin C-P Coronal 10 (Stain - Haematoxylin Eosin) 1939 Hystereaomy. Advanced. Ag added
7669 E, 5.0 Ch., 23x16x14 Good Formol C-P Coronal 6 (Stain - Haematoxylin Eosin) 1939 Hysterectomy. Least advanced in group, Ag added
7889 E, 4.2 Exc. Bouin C-P Coronal 6 (Stain - Haematoxylin Eosin) 1941 Hysterectomy
8066 E,53 C h , 20x18xI8 Exc. Bouin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1942 Hysterectomy. Ag added to slide 2
8119 E., 5.3 Ch., 32x28x6.5 Exc. Bouin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1943 Hysterectomy
8147 E., 5.2 Ch., 27x21x19 Poor Formol ? ? p p 1943 Tubal Not cut
8239 E., 4.3 Exc. Bouin C-P Sagittal 8 H. phlox. 1944
8372 E., 5.6 Exc. Alc.& Bouin P Transverse 10 Azan 1946
8581 E., 4.8 Good Kaiserling C-P Sagittal 8 Azan 1948 Most-advanced third
8967 E., 5.7 Exc. Acetic Zenker C-P Transverse 6 (Stain - Haematoxylin Eosin) 1931 Head injured. Univ. Chicago No. H1426
9296 E,4.5 Exc. C-P Coronal 8 Azan 1955
9297 E., 4.5 Exc. C-P Sagittal 8 Azan 1955
9697 E., 5.5 Bouin 1956 not cut
Carnegie Collection Embryos - Stage 13 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
1 E.,4.5 Ch., 30x30 Poor Salicylic acid P Transverse 10 Hemat. 1887 Obtained by Mall while student
19 E., 5.5 Ch., 18x14 Poor p ? Transverse 20 Al. coch. 1895
98 E., 4 Ch., 24x16x9 Poor p P Transverse 20 Al. coch. 1896
76 E., 4.5 Ch., 22x20 Poor Alc. P Transverse 20 Al. coch. 1897
112 E., 4 Poor p P Sagittal 10 Al. coch. p
116 E., 5 Poor p ? Sagittal 10 Al. coch. 1898
148 E.,4.3 Ch., 17x14x10 Poor Alc. P Coronal 10 (Stain - Haematoxylin Eosin) 1899 Abnormal. Nasal discs fused
186 E.,3.5 Ch., 25x20x15 Poor Alc. P Transverse 20 Al. coch. 1901
239 E., 3.0 Poor Formalin P Transverse 10 (Stain - Haematoxylin Eosin) 1903
248 E., 4.5 Ch., 30x23x15 Poor p ? Coronal 50 Al. coch. 1904
407 E.,4 Ch., 14x13X7 Poor Formalin ? Transverse 40 Al. coch. 1907
463 E., 3.9 Ch., 17x12x7 Good Formalin P Coronal 10 Al. coch. 1910
523 E., 5 Ch., 25x25x15 Fair Formalin P Transverse p Al. coch. 1911
588 E., 4.0 Ch., 19x15x8 Good Corros. acetic P Coronal 15 (Stain - Haematoxylin Eosin) 1912 Advanced
786 E., 4.5 Ch., 19x10x10 Poor Alc. P Sagittal 15 Al. coch. 1913
800 E., 6.0 Good Corros. acetic P Transverse 10 H 1913 Curettage. Anencephaly
808 E.,4.0 Poor Corros. acetic P Transverse 15 Al. coch. 1914 Tubal Incomplete
826 E., 5.0 Ch., 13x13x9 Good Formalin P Transverse 20 Al. coch. 1914 Shrunken
836 E.,4.0 Ch., 22x18x11 Exc. Corros. acetic P Transverse 15 Al. coch. 1914 Less advanced
963 E.,4.0 Ch., 23x18x16 Good Formalin P Coronal 20 Al. coch. 1914
1075 E.,6.0 Ch., 46x32x20 Exc. Corros. acetic P Coronal 20 (Stain - Haematoxylin Eosin) or. G. 1915 Most advanced in group
3956 E., 4.0 Poor Formalin P Transverse 20 Al. coch. 1922 Tubal Incomplete
4046 E.,5 Ch., 22x20x20 Poor Formalin P Transverse 50 Al. coch. 1922
5541 E., 6.0 Ch., 35x30x20 Good Formalin P Transverse 10 Al. coch., eosin 1927
5682 E., 5.3 Ch., 29x25x13 Poor Formalin P Coronal 20 Al. coch. 1928
5874 E., 4.8 Exc. Bouin P Transverse 10 (Stain - Haematoxylin Eosin) 1929 Hysterotomy. Bromides only
6032 E., 5.8 Ch., 30x24x13 Poor Formalin P P ? p 1929 Not good enough to cut
6469 E., 5.0 Ch., 25x18x18 Poor Formalin P P P P 1932 Fragmented on cutting. Not saved
6473 E., 5.0 Ch, 30x30x15 Exc. Formalin C-P Coronal 6 Al. coch. 1932 Less advanced. Ag added
7433 E., 5.2 Ch., 15x13x13 Exc. Formalin C-P Coronal 8 (Stain - Haematoxylin Eosin) 1937 Tubal
7618 E, 48 Ch, 18x15x15 Exc. Bouin C-P Coronal 10 (Stain - Haematoxylin Eosin) 1939 Hystereaomy. Advanced. Ag added
7669 E, 5.0 Ch., 23x16x14 Good Formalin C-P Coronal 6 (Stain - Haematoxylin Eosin) 1939 Hysterectomy. Least advanced in group, Ag added
7889 E, 4.2 Exc. Bouin C-P Coronal 6 (Stain - Haematoxylin Eosin) 1941 Hysterectomy
8066 E,53 Ch , 20x18xI8 Exc. Bouin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1942 Hysterectomy. Ag added to slide 2
8119 E., 5.3 Ch., 32x28x6.5 Exc. Bouin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1943 Hysterectomy
8147 E., 5.2 Ch., 27x21x19 Poor Formalin ? ? p p 1943 Tubal Not cut
8239 E., 4.3 Exc. Bouin C-P Sagittal 8 H. phlox. 1944
8372 E., 5.6 Exc. Alc.& Bouin P Transverse 10 Azan 1946
8581 E., 4.8 Good Kaiserling C-P Sagittal 8 Azan 1948 Most-advanced third
8967 E., 5.7 Exc. Acetic Zenker C-P Transverse 6 (Stain - Haematoxylin Eosin) 1931 Head injured. Univ. Chicago No. H1426
9296 E,4.5 Exc. C-P Coronal 8 Azan 1955
9297 E., 4.5 Exc. C-P Sagittal 8 Azan 1955
9697 E., 5.5 Bouin 1956 not cut
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • Stain -
  • ? - unknown or not determined.


Stage 14

Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
4 E.,7 Poor p P Trans. 10 Al. coch. 1892
18 E.,7 Ch., 18x18 Poor p P Trans. 20 Al. coch. 1895
80 E., 5.0 Ch., 24x18x8 Good Alc. P Trans. 20 Al. coch. 1897
187 E.,7 Ch., 35x30x25 Poor ? P Sag. 20 Al. coch. 1902
208 E.,7 Ch., 22x11Xx1 Poor ? P Sag. 20 Al. coch. 1902
245 E.,6 Ch., 13x12x10 Poor Formol, Zenker ? Trans. 5 (Stain - Haematoxylin Eosin) 1904
372 E.,7 Fair p P Trans. 10 H.-Congo red 1902
380 E,6 Ch., 20x20x14 Poor p P Sag. 20 (Stain - Haematoxylin Eosin) 1906
387 E.,7 Ch., 45x40x50 Good Formol P Trans. 20 (Stain - Haematoxylin Eosin) 1907
442 E.,6 Ch., 25x20 Poor Formol P Cor.? 50 Al. coch. 1908
552 E.,6 Ch, 40x28Xx8 Poor p P Sag. 40 Al. coch. 1911 Possible anencephaly
560 E., 7.0 Ch, 24x24 Poor Formol P Cor. 40 Al. coch. 1912
676 E., 6.0 Ch, 35x20x17 Good Carnoy P Tr.-Cor. 20 (Stain - Haematoxylin Eosin) 1913 Possible spina bifida
873 E,6.0 Ch., 35x28x16 Poor Formol P Sag. 20 Al. coch. 1914
988 E,6.0 Ch., 38x30x23 Good Formol-corros. acetic P Trans. 20 Al. coch. 1914
1380 E , 5.7 Ch, 36x24x24 Exc. Formol P Cor. 20 Al. coch. 1916
1620 E, 6.6 Ch, 35x30x8 Good Formol P Sag. 20 Al. coch. 1916
?? E, 6.68 Fair ? ? Trans. 6 Al. coch., or. G 1919
2841 E , sy Ch. 35x21 Good Alc. P Trans. 20 (Stain - Haematoxylin Eosin) or.G 1920
3360 E.6.0 Good Formol C Trans. 20 (Stain - Haematoxylin Eosin) or.G 1920 In mvomatous uterus. Advanced.
3805 E., 5.9 Exc. Bouin P Trans. 15 (Stain - Haematoxylin Eosin) 1921 Evans embryo No. 168. Serial bromides only
3960 E., 5.5 Good Formol C-P Cor. 20 Al. coch. 1922 Blood vessels naturally injected
4154 E, 6.8 Ch., 33x31x20 Poor Alc. C-P Trans. 8 (Stain - Haematoxylin Eosin) 1923
4245-6 E., 7.0 Good Formol P Trans. 15 Al. coch. 1923 Univ. Pennsylvania No. 40. Ag added
4629 E., 6.5 Ch.,32x23 Good Formol C-P Sag. 10 (Stain - Haematoxylin Eosin) 1924
4672 E,8.2 Ch., 40X34X25 Good Formol P Trans. 20 Al. coch. 1924 Advanced
4805 E., 7.3 Ch., 15X8X9 Good Formol C-P Trans. 10 (Stain - Haematoxylin Eosin) 1924 Tubal
5437 E., 7.0 Good Formol C-P Trans. 8 (Stain - Haematoxylin Eosin) 1927 Advanced
5654 E., 5.0 Ch., 30X23X17 Good Formol P Trans. 10 Al. coch., eosin 1928 Less advanced
5787 E., 6.8 Ch., 32x30x23 Good Formol P Sag. 10 Al. coch., eosin 1928
6428 E., 7.0 Ch., 30X28X25 Good Formol C-P Cor. 6, 10 Al. coch. 1931 Advanced
6500 E, 4.9* Good Souza? C-P Sag. 10 Al. coch. 1931 E. Leitz, Berlin
6502 E., 6.7* Exc. Souza? C-P Trans. 5, 10 (Stain - Haematoxylin Eosin) 1931 E. Leitz, Berlin. Ag added to slides 1-25
6503 E., 6.3* Exc. Souza? C-P Cor. 10 Al. coch. 1931 E. Leitz, Berlin
6739 E.,8 Poor Formol C-P Sag. 20 (Stain - Haematoxylin Eosin) 1933
6830 E,5.5 Ch., 47X23X15 Exc. Formol C-P Cor. 8 (Stain - Haematoxylin Eosin) 1933
6848 E., 7.8 Good Formol C-P Cor. 10 (Stain - Haematoxylin Eosin) 1934 Tubal
7324 E, 6.6 Ch., 17x13x10 Good Formol C-P Trans. 8 (Stain - Haematoxylin Eosin) 1936 Low implantation
7333 E, 6.3 Good Formol C-P Trans. 8 (Stain - Haematoxylin Eosin) 1936
7394 E, 7.2 Ch., 45X20X20 Exc. Formol C-P Trans. 8 (Stain - Haematoxylin Eosin) 1937
7400 E, 6.3 Ch., 35X25x20 Good Formol C-P Cor. 10 (Stain - Haematoxylin Eosin) 1937
7522 E., 7.7 Ch., 33x16x16 Good Formol C-P Trans. 8 (Stain - Haematoxylin Eosin) 1938 Natural blood injection
7598 E., 7.0 Ch., 30x30x25 Poor Alc. C-P Trans. 10 (Stain - Haematoxylin Eosin) 1938 Macerated
7667 E., 5 Ch., 16x14x12 Fair Formol P Trans. 8 (Stain - Haematoxylin Eosin), phlox. 1939
7829 E., 7.0 Exc. Bouin C-P Trans. 8 (Stain - Haematoxylin Eosin) 1940 Advanced
7870 E,7.2 Ch., 25x20x13 Exc. Bouin C-P Trans. 8 (Stain - Haematoxylin Eosin) 1941 On borderline of next stage. Ag added
8141 E,7.3 Ch.,33x28 Exc. C-P Cor. 8 (Stain - Haematoxylin Eosin) 1943 Shrinkage cracks in brain
8306 E.5.3 Ch., 27 Exc. Bouin C-P Trans. 10, 20 (Stain - Haematoxylin Eosin), phlox. 1945
8308 E, 5.85 Ch., 27x18x18 Exc. Formol & Bouin C-P Sag. 8 Azan 1945
8314 E,8 Ch.,23x22 Exc. Formol C-P Trans. 8 Azan 1945
8357 E., 6.5 Good Formol C-P Sag. 8 Azan 1946
8552 E,6.5 Exc. Alc. & Bouin C-P Trans. 8 Azan 1947
8999 E,6 Ch.,16x15 Exc. Alc. & Bouin C-P Sag. 8 Azan 1952
9695 E,8.5 ? 1955 Not cut
Carnegie Collection Embryos - Stage 14 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
4 E.,7 Poor p P Transverse 10 Al. coch. 1892
18 E.,7 Ch., 18x18 Poor p P Transverse 20 Al. coch. 1895
80 E., 5.0 Ch., 24x18x8 Good Alc. P Transverse 20 Al. coch. 1897
187 E.,7 Ch., 35x30x25 Poor ? P Sagittal 20 Al. coch. 1902
1208 E.,7 Ch., 22x11Xx1 Poor ? P Sagittal 20 Al. coch. 1902
245 E.,6 Ch., 13x12x10 Poor Formol, Zenker ? Transverse 5 (Stain - Haematoxylin Eosin) 1904
372 E.,7 Fair p P Transverse 10 H.-Congo red 1902
380 E,6 Ch., 20x20x14 Poor p P Sagittal 20 (Stain - Haematoxylin Eosin) 1906
387 E.,7 Ch., 45x40x50 Good Formalin P Transverse 20 (Stain - Haematoxylin Eosin) 1907
442 E.,6 Ch., 25x20 Poor Formalin P Coronal? 50 Al. coch. 1908
552 E.,6 Ch, 40x28Xx8 Poor p P Sagittal 40 Al. coch. 1911 Possible anencephaly
560 E., 7.0 Ch, 24x24 Poor Formalin P Coronal 40 Al. coch. 1912
676 E., 6.0 Ch, 35x20x17 Good Carnoy P Tr.-Coronal 20 (Stain - Haematoxylin Eosin) 1913 Possible spina bifida
873 E,6.0 Ch., 35x28x16 Poor Formalin P Sagittal 20 Al. coch. 1914
988 E,6.0 Ch., 38x30x23 Good Formol-corros. acetic P Transverse 20 Al. coch. 1914
1380 E , 5.7 Ch, 36x24x24 Exc. Formalin P Coronal 20 Al. coch. 1916
1620 E, 6.6 Ch, 35x30x8 Good Formalin P Sagittal 20 Al. coch. 1916
?? E, 6.68 Fair ? ? Transverse 6 Al. coch., or. G 1919
2841 E , sy Ch. 35x21 Good Alc. P Transverse 20 (Stain - Haematoxylin Eosin) or.G 1920
3360 E.6.0 Good Formalin C Transverse 20 (Stain - Haematoxylin Eosin) or.G 1920 In myomatous uterus. Advanced.
3805 E., 5.9 Exc. Bouin P Transverse 15 (Stain - Haematoxylin Eosin) 1921 Evans embryo No. 168. Serial bromides only
3960 E., 5.5 Good Formalin C-P Coronal 20 Al. coch. 1922 Blood vessels naturally injected
4154 E, 6.8 Ch., 33x31x20 Poor Alc. C-P Transverse 8 (Stain - Haematoxylin Eosin) 1923
4245-6 E., 7.0 Good Formalin P Transverse 15 Al. coch. 1923 Univ. Pennsylvania No. 40. Ag added
4692 E., 6.5 Ch., 32x23 Good Formalin C-P Sagittal 10 (Stain - Haematoxylin Eosin) 1924
4672 E,8.2 Ch., 40X34X25 Good Formalin P Transverse 20 Al. coch. 1924 Advanced
4805 E., 7.3 Ch., 15X8X9 Good Formalin C-P Transverse 10 (Stain - Haematoxylin Eosin) 1924 Tubal
5437 E., 7.0 Good Formalin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1927 Advanced
5654 E., 5.0 Ch., 30x23x17 Good Formalin P Transverse 10 Al. coch., eosin 1928 Less advanced
5787 E., 6.8 Ch., 32x30x23 Good Formalin P Sagittal 10 Al. coch., eosin 1928
6428 E., 7.0 Ch., 30X28X25 Good Formalin C-P Coronal 6, 10 Al. coch. 1931 Advanced
6500 E, 4.9* Good Souza? C-P Sagittal 10 Al. coch. 1931 E. Leitz, Berlin
6502 E., 6.7* Exc. Souza? C-P Transverse 5, 10 (Stain - Haematoxylin Eosin) 1931 E. Leitz, Berlin. Ag added to slides 1-25
6503 E., 6.3* Exc. Souza? C-P Coronal 10 Al. coch. 1931 E. Leitz, Berlin
6739 E.,8 Poor Formalin C-P Sagittal 20 (Stain - Haematoxylin Eosin) 1933
6830 E,5.5 Ch., 47x23x15 Exc. Formalin C-P Coronal 8 (Stain - Haematoxylin Eosin) 1933
6848 E., 7.8 Good Formalin C-P Coronal 10 (Stain - Haematoxylin Eosin) 1934 Tubal
7324 E, 6.6 Ch., 17x13x10 Good Formalin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1936 Low implantation
7333 E, 6.3 Good Formalin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1936
7394 E, 7.2 Ch., 45x20x20 Exc. Formalin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1937
7400 E, 6.3 Ch., 35x25x20 Good Formalin C-P Coronal 10 (Stain - Haematoxylin Eosin) 1937
7522 E., 7.7 Ch., 33x16x16 Good Formalin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1938 Natural blood injection
7598 E., 7.0 Ch., 30x30x25 Poor Alc. C-P Transverse 10 (Stain - Haematoxylin Eosin) 1938 Macerated
7667 E., 5 Ch., 16x14x12 Fair Formalin P Transverse 8 (Stain - Haematoxylin Eosin), phlox. 1939
7829 E., 7.0 Exc. Bouin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1940 Advanced
7870 E,7.2 Ch., 25x20x13 Exc. Bouin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1941 On borderline of next stage. Ag added
8141 E,7.3 Ch.,33x28 Exc. C-P Coronal 8 (Stain - Haematoxylin Eosin) 1943 Shrinkage cracks in brain
8306 E.5.3 Ch., 27 Exc. Bouin C-P Transverse 10, 20 (Stain - Haematoxylin Eosin), phlox. 1945
8308 E, 5.85 Ch., 27x18x18 Exc. Formol & Bouin C-P Sagittal 8 Azan 1945
8314 E,8 Ch.,23x22 Exc. Formol C-P Transverse 8 Azan 1945
8357 E., 6.5 Good Formol C-P Sagittal 8 Azan 1946
8552 E,6.5 Exc. Alc. & Bouin C-P Transverse 8 Azan 1947
8999 E,6 Ch.,16x15 Exc. Alc. & Bouin C-P Sagittal 8 Azan 1952
9695 E,8.5 ? 1955 Not cut
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • Stain -
  • ? - unknown or not determined.

Stage 15

Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
2 E., 7.0 Ch., 25X25X25 Good Alc. P Trans. 15 Al. carm. 1888 Least-advanced third
88 E.,8 Ch., 30x28x15 Poor Alc. P Cor. P Al. coch. 1897
113 E.,8 241 E,6.0 Poor P p Sag. 10 Borax carmine ?
241 E,6.0 Good Formol P Trans. 10 H. & Congo red 1904
371 E,6.6 Good Formol P Sag. 10 Al. coch. 1913 Shrunken and cracked
389 E., 9 Poor p p Sag. 20 (Stain - Haematoxylin Eosin) 1907 Tubal
721 E., 9.0 Ch., 30x20x10 Exc. Zenker formol P Trans. 15 (Stain - Haematoxylin Eosin) 1913 Median in group
810 E., 7.0 Ch, 30x25x15 Good Alc. P Sag. 20 Al. coch 1913
855 E.,7.5 Poor Formol P Trans. 100 Al. coch. 1914 Pathological between limbs
1006 E,9.0 Ch., 37x26x22 Poor Formol P Cor. 20 (Stain - Haematoxylin Eosin) or. G. 1914 Operative. Most-advanced third
1091 E,7.2 Ch., 28x26x20 Poor P Cor. 20 Al. coch. 1915 Macerated
1354 E,7.8 Ch, 35x30x25 Good Formol P Sag. 20 Al. coch. 1916 Least-advanced third
1767 E , 11.0 Ch, 41 X23X5 Good Formol P Sag. 40 (Stain - Haematoxylin Eosin) or. G. 1917 Most-advanced third
2743 E., 7.2 Ch., 19xl8x 14 Poor Formol P Trans. 20 Al. coch. 1919 Macerated. Least-advanced third
3216 E, 6.5 Ch, 30x30x5 Good Formol P Trans. 20 Al. coch. 1920 Hysterectomy. Least-advanced third
3385 E,83 Ch., 25x20x16 Exc. Corros. acetic P Trans. 20 (Stain - Haematoxylin Eosin) or. G. 1921 Some sections lost. Most-advanced third. Ag added
3441 E,8.0 Ch., 25x24x20 Good Formol P Sag. 10 Al. coch. 1921
3512 E,8,5 Ch., 33x28x25 Good Formol P Trans. 10 Al. coch. 1921
3952 E,6,7 Ch., 30x25x15 Good Formol P Cor. 15 Al. coch. 1922 Median in group
4602 E,9.3 Ch,, 33x30x26 Good Formol P Sag. 15 Al. coch. 1924 Medical abortion
4782 E,9.0 Ch., I4xl3x 11 Poor Formol P Cor. 20 Al. coch. 1924
5772 E, 8 Poor ? P Cor. 15 Al. coch. eosin 1928
5?92 E, 3 Good Corros. acetic C-P Cor. 10 Al. coch. phlox 1929 Transitional to next stage
6223 E ? Poor Alc. C-P Sag. 8 Or. G. 1930 Fragmented sections. Not saved
65??
6???
6508
6595
????


Carnegie Collection Embryos - Stage 15 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
2 E., 7.0 Ch., 25x25x25 Good Alc. P Transverse 15 Al. carm. 1888 Least-advanced third
88 E.,8 Ch., 30x28x15 Poor Alc. P Coronal P Al. coch. 1897
113 E.,8 241 E,6.0 Poor P p Sagittal 10 Borax carmine ?
241 E,6.0 Good Formalin P Transverse 10 H. & Congo red 1904
371 E,6.6 Good Formalin P Sagittal 10 Al. coch. 1913 Shrunken and cracked
389 E., 9 Poor p p Sagittal 20 (Stain - Haematoxylin Eosin) 1907 Tubal
721 E., 9.0 Ch., 30x20x10 Exc. Zenker formol P Transverse 15 (Stain - Haematoxylin Eosin) 1913 Median in group
810 E., 7.0 Ch, 30x25x15 Good Alc. P Sagittal 20 Al. coch 1913
855 E.,7.5 Poor Formalin P Transverse 100 Al. coch. 1914 Pathological between limbs
1006 E,9.0 Ch., 37x26x22 Poor Formalin P Coronal 20 (Stain - Haematoxylin Eosin) or. G. 1914 Operative. Most-advanced third
1091 E,7.2 Ch., 28x26x20 Poor P P Coronal 20 Al. coch. 1915 Macerated
1354 E,7.8 Ch, 35x30x25 Good Formalin P Sagittal 20 Al. coch. 1916 Least-advanced third
1767 E , 11.0 Ch, 41x23x5 Good Formalin P Sagittal 40 (Stain - Haematoxylin Eosin) or. G. 1917 Most-advanced third
2743 E., 7.2 Ch., 19xl8x14 Poor Formalin P Transverse 20 Al. coch. 1919 Macerated. Least-advanced third
3216 E, 6.5 Ch, 30x30x5 Good Formalin P Transverse 20 Al. coch. 1920 Hysterectomy. Least-advanced third
3385 E,83 Ch., 25x20x16 Exc. Corros. acetic P Trans. 20 (Stain - Haematoxylin Eosin) or. G. 1921 Some sections lost. Most-advanced third. Ag added
3441 E,8.0 Ch., 25x24x20 Good Formalin P Sag. 10 Al. coch. 1921
3512 E,8,5 Ch., 33x28x25 Good Formalin P Trans. 10 Al. coch. 1921
3952 E,6,7 Ch., 30x25x15 Good Formalin P Cor. 15 Al. coch. 1922 Median in group
4602 E,9.3 Ch,, 33x30x26 Good Formalin P Sag. 15 Al. coch. 1924 Medical abortion
4782 E,9.0 Ch., I4xl3x11 Poor Formalin P Cor. 20 Al. coch. 1924
5772 E, 8 Poor ? P Cor. 15 Al. coch. eosin 1928
Template:CE5?92 E, 3 Good Corros. acetic C-P Cor. 10 Al. coch. phlox 1929 Transitional to next stage
6223 E ? Poor Alc. C-P Sag. 8 Or. G. 1930 Fragmented sections. Not saved
6504
6506
6508
6595
????
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • ? - unknown or not determined.

1987 - Stage 15 | Carnegie stage 15

Stage 16

Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
163 E., 9.0 Ch., 35x35x20 Good Formol P Transverse 20 Al. coch. 1899 Used by Bardeen and Lewis
221 E., 7.5 Ch., 40x33x33 Poor Formol P Sagittal 20 Al. coch. 1903 Macerated
383 E., 7.0 Ch., 15x15x15 Poor Formol P Trans. 10 Al. carm., H. & Congo red 1904
397 E., 8.0 Ch., 15x15x15 Poor Formol P Trans. 10 (Stain - Haematoxylin Eosin) 1907
422 E., 9.0 Ch., 30x30x30 Poor Alc. P Trans. 40 Al. coch. 1910 Tubal. Partly macerated
559 E., 8.6 Ch., 20x15x12 Good Formol P Trans. 20 H. & Congo red 1911 Cyclopia. Formerly listed as stage 17
589 E., 11 Ch., 30x13x13 Poor p P Sag. 50 Al. coch. 1912
617 E., 7.0 Ch., 18x14x12 Good Formol P Trans. 15 Al. coch. 1912 Median in group
636 E., 10 Ch.,28x28x22 Poor Formol P Trans. 50 Al. coch. 1913 Macerated
651f E., 7 Ch., 25x20x15 Poor p p p p p 1913 Spina bifida
675 E., 10 Ch., 50x30x25 Poor Formol P Sag. 100 Carmine 1915 Abnormal head and limbs
792 E., 8.0 Ch., 40x30x30 Good Formol P Trans. 20 Al. coch. 1913 Advanced
887 E, 9.0 Ch., 31x28x17 Good Formol P Trans. 40 Al. coch. 1914 Near next stage
1121 E., 11.8 Good Corros. acetic P Cor. 40 Al. coch. 1915 Operative. Median in group
1197 E., 10.0 Ch., 23x19x15 Good Formol C Sag. 20 (Stain - Haematoxylin Eosin), or. G. 1915 Advanced
1544 E., 7.2 Good Zenker P Sag. 20 Al. coch. 1916 Tubal. Mechanical injury
1836 E., 11.0 Good Formol P Trans. 20 (Stain - Haematoxylin Eosin) 1917 Most-advanced third
4677 E., 9.5 Ch., 48x36x30 Good Formol P Trans. 10 Al. coch. 1924 Median in group
5515 E., 12.0 Ch., 47x37x25 Good Formol C-P Trans. 10 (Stain - Haematoxylin Eosin) 1927 Near next stage
6054 E., 7,0 Ch., 21x17x12 Good Formol C-P Trans. 8 (Stain - Haematoxylin Eosin) 1930 Least-advanced third
6507 E., 9.0* Exc. Corros. acetic C-P Cor. 10 & 8 Al. coch. p Middle or most-advanced third
6509 E. 8.1* Exc. Corros. acetic C-P Cor. 10 Al. coch. p Least-adianced or middle third
6510 E., 10.1* Exc. Corros. acetic C-P Cor. 10 Al. coch. p Close to No. 6507. Ag added
6511 E, 8.1* Good Corros. acetic C-P Sag. 10 Al. coch., iron H. p Surface injured by fixative. Most-advanced third
6512 E., 7.0* Exc. Corros. acetic C-P Trans. 10 Al. coch. p Least-advanced third. Borderline
6513 E., 7.2* Good Corros. acetic C-P Cor. 10 Al. coch. p Surface injured by fixative. Least advanced in group
6514 E., 9 0* Poor Corros. acetic C-P Sag. 10 Al. coch. p Most-advanced third
6516 E., 10 5* Good Corros acetic C-P Sag. 8 Al. coch. p Most-advanced third. Double left kidney and ureter
6517 E., 10.5* Exc. Corros. acetic C-P Trans. 8 Al. coch. ? Close to No. 6516
6686 E., 11.0 Ch., l7x17xP Poor Formol C-P Cor. 20 Al. coch. 1933 Tubal. Partly macerated
6750 E., 10.0 Good Formol C-P Trans. 10 H. & phlox. 1933 Tubal. Advanced
6909 E., 11.0 Good Bouin C-P Cor. 10 (Stain - Haematoxylin Eosin) 1934 Tubal. Advanced
6931 E., 8.8 Ch., 3""x 33x16 Good Formol C-P Cor. 10 Al coch., phlox. 1934 Least-advanced third. Type specimen
6950 E.. 9 0 Ch., 3lx20x18 Good Formol C-P Trans. 10 (Stain - Haematoxylin Eosin) 1934 Tubal. Partly fragmented
7?15 E., 9.7 Exc Bouin C-P Cor. 10 H. & phlox 1935 Operative. Less advanced
7629 E., 11.5 Ch., 31x31 Good Formol C-P Cor. 10 Al. coch., phlox 1939 Hysterectomy. Most advanced in group
7804 E., 9.5 Ch., 26x21x16 Good Formol C-P Trans. 10 (Stain - Haematoxylin Eosin) 1940 Least-advanced third
7897 E., 12.2 Ch., 31x24x23 Good Formol C-P Trans. 10 (Stain - Haematoxylin Eosin) 1941 Tubal. Advanced
8098 E., 10.0 Ch., 30 Good Formol C-P Cor. 6 (Stain - Haematoxylin Eosin) 1942 Tubal. Median in group
8112 E., 10.9 Exc. Bouin C-P Cor. 8 (Stain - Haematoxylin Eosin) 1943 Most-advanced third
8179 E., 11.9 Ch., 23x18x17 Good Formol C-P Cor. 10 (Stain - Haematoxylin Eosin) 1943 Tubal
8436 E., 10.9 Ch., 13x15x1? Good Formol P Cor. 10 Azan 1946 Advanced
8692 E., 10 Good Bouin P Trans. 10 (Stain - Haematoxylin Eosin) 1949 Rubella. Medical abortion. Mechanically damaged
8697 E., 11.3 Poor Formol C-P Trans. 10 (Stain - Haematoxylin Eosin) 1949 Perhaps stage 17
8773 E, 11 Exc. Bouin P Cor. 10 Azan 1950
8971 E., 10 Ch., 20.5x14.5x13.7 Poor Formol Trans. 15 (Stain - Haematoxylin Eosin) 1932 Synophthalmia. Univ. Chicago No. H 1439
9055 E., ca. 10 Exc. Bouin P Trans. 20 Azan & Ag 1953 Damaged
9229 E, 9.5 Exc. Formol P Trans. 6 Ag & (Stain - Haematoxylin Eosin) 1954 Stage 15, 16, or 17? Mislaid


Carnegie Collection Embryos - Stage 16 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
163 E., 9.0 Ch., 35x35x20 Good Formol P Transverse 20 Al. coch. 1899 Used by Bardeen and Lewis
221 E., 7.5 Ch., 40x33x33 Poor Formalin P Sagittal 20 Al. coch. 1903 Macerated
383 E., 7.0 Ch., 15x15x15 Poor Formalin P Transverse 10 Al. carm., H. & Congo red 1904
397 E., 8.0 Ch., 15x15x15 Poor Formalin P Transverse 10 (Stain - Haematoxylin Eosin) 1907
422 E., 9.0 Ch., 30x30x30 Poor Alc. P Transverse 40 Al. coch. 1910 Tubal. Partly macerated
559 E., 8.6 Ch., 20x15x12 Good Formalin P Transverse 20 H. & Congo red 1911 Cyclopia. Formerly listed as stage 17
589 E., 11 Ch., 30x13x13 Poor p P Sagittal 50 Al. coch. 1912
617 E., 7.0 Ch., 18x14x12 Good Formalin P Transverse 15 Al. coch. 1912 Median in group
636 E., 10 Ch.,28x28x22 Poor Formalin P Transverse 50 Al. coch. 1913 Macerated
651f E., 7 Ch., 25x20x15 Poor p p p p p 1913 Spina bifida
675 E., 10 Ch., 50x30x25 Poor Formalin P Sagittal 100 Carmine 1915 Abnormal head and limbs
792 E., 8.0 Ch., 40x30x30 Good Formalin P Transverse 20 Al. coch. 1913 Advanced
887 E, 9.0 Ch., 31x28x17 Good Formalin P Transverse 40 Al. coch. 1914 Near next stage
1121 E., 11.8 Good Corros. acetic P Coronal 40 Al. coch. 1915 Operative. Median in group
1197 E., 10.0 Ch., 23x19x15 Good Formalin C Sagittal 20 (Stain - Haematoxylin Eosin), or. G. 1915 Advanced
1544 E., 7.2 Good Zenker P Sagittal 20 Al. coch. 1916 Tubal. Mechanical injury
1836 E., 11.0 Good Formalin P Transverse 20 (Stain - Haematoxylin Eosin) 1917 Most-advanced third
4677 E., 9.5 Ch., 48x36x30 Good Formalin P Transverse 10 Al. coch. 1924 Median in group
5515 E., 12.0 Ch., 47x37x25 Good Formalin C-P Transverse 10 (Stain - Haematoxylin Eosin) 1927 Near next stage
6054 E., 7,0 Ch., 21x17x12 Good Formalin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1930 Least-advanced third
6507 E., 9.0* Excellent Corros. acetic C-P Coronal 10 & 8 Al. coch. p Middle or most-advanced third
6509 E. 8.1* Excellent Corros. acetic C-P Coronal 10 Al. coch. p Least-adianced or middle third
6510 E., 10.1* Excellent Corros. acetic C-P Coronal 10 Al. coch. p Close to No. 6507. Ag added
6511 E, 8.1* Good Corros. acetic C-P Sagittal 10 Al. coch., iron H. p Surface injured by fixative. Most-advanced third
6512 E., 7.0* Excellent Corros. acetic C-P Transverse 10 Al. coch. p Least-advanced third. Borderline
6513 E., 7.2* Good Corros. acetic C-P Coronal 10 Al. coch. p Surface injured by fixative. Least advanced in group
6514 E, 9 0* Poor Corros. acetic C-P Sagittal 10 Al. coch. p Most-advanced third
6516 E., 10 5* Good Corros acetic C-P Sagittal 8 Al. coch. p Most-advanced third. Double left kidney and ureter
6517 E., 10.5* Excellent Corros. acetic C-P Transverse 8 Al. coch. ? Close to No. 6516
6686 E., 11.0 Ch., l7x17xP Poor Formalin C-P Coronal 20 Al. coch. 1933 Tubal. Partly macerated
6750 E., 10.0 Good Formalin C-P Transverse 10 H. & phlox. 1933 Tubal. Advanced
6909 E., 11.0 Good Bouin C-P Coronal 10 (Stain - Haematoxylin Eosin) 1934 Tubal. Advanced
6931 E., 8.8 Ch., 3""x 33x16 Good Formalin C-P Coronal 10 Al coch., phlox. 1934 Least-advanced third. Type specimen
6950 E.. 9 0 Ch., 3lx20x18 Good Formalin C-P Transverse 10 (Stain - Haematoxylin Eosin) 1934 Tubal. Partly fragmented
7?15 E., 9.7 Exc Bouin C-P Coronal 10 H. & phlox 1935 Operative. Less advanced
7629 E., 11.5 Ch., 31x31 Good Formalin C-P Coronal 10 Al. coch., phlox 1939 Hysterectomy. Most advanced in group
7804 E., 9.5 Ch., 26x21x16 Good Formalin C-P Transverse 10 (Stain - Haematoxylin Eosin) 1940 Least-advanced third
7897 E., 12.2 Ch., 31x24x23 Good Formalin C-P Transverse 10 (Stain - Haematoxylin Eosin) 1941 Tubal. Advanced
8098 E., 10.0 Ch., 30 Good Formalin C-P Coronal 6 (Stain - Haematoxylin Eosin) 1942 Tubal. Median in group
8112 E., 10.9 Excellent Bouin C-P Coronal 8 (Stain - Haematoxylin Eosin) 1943 Most-advanced third
8179 E., 11.9 Ch., 23x18x17 Good Formalin C-P Coronal 10 (Stain - Haematoxylin Eosin) 1943 Tubal
8436 E., 10.9 Ch., 13x15x1? Good Formalin P Coronal 10 Azan 1946 Advanced
8692 E., 10 Good Bouin P Transverse 10 (Stain - Haematoxylin Eosin) 1949 Rubella. Medical abortion. Mechanically damaged
8697 E., 11.3 Poor Formalin C-P Transverse 10 (Stain - Haematoxylin Eosin) 1949 Perhaps stage 17
8773 E, 11 Excellent Bouin P Coronal 10 Azan 1950
8971 E., 10 Ch., 20.5x14.5x13.7 Poor Formalin Transverse 15 (Stain - Haematoxylin Eosin) 1932 Synophthalmia. Univ. Chicago No. H 1439
Template:CE9055 E., ca. 10 Excellent Bouin P Transverse 20 Azan & Ag 1953 Damaged
9229 E, 9.5 Excellent Formalin P Transverse 6 Ag & (Stain - Haematoxylin Eosin) 1954 Stage 15, 16, or 17? Mislaid
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin Bouin solution)
  • Stain -
  • ? - unknown or not determined.


1987 - Stage 16 | Carnegie stage 16

Stage 17

Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
353 E, 11.0 Ch., 40x35x20 Good Formol P Cor. 10 H.&E. 1906 Very advanced
485 E, 13.0 Ch., 33x25 Exc. Formol P Cor. 40 Al. coch. 1911 Injected (India ink)
544 E., 11.5 Ch., 30 Good Zenker-Formol P Sag. 40 Al. coch. 1911 Operative Injected (India ink)
562 E, 13.0 Ch., 28x17x17 Poor Formol P Sag. 100 Al. coch. 1912 Advanced
623 E 10.1 Good Ale. P Trans. 20 H. & Congo red 1912 Operative. Median in group
695 E, 13.5 Ch., 40x40x17 Poor Formol P Trans. 10 H. & Congo red 1913 Macerated
916 E, 11.0 Ch, 30x30x16 Good Bouin C Trans. 40 H.&E, or. G. 1915 Most-advanced third
940 E, 14.0 Ch, 28x23x21 Good Formol C Trans. 40 H.&E, or. G. 1914 Advanced
1232 E, 14.5 Ch., 35x35x30 Poor Formol P Cor. 40 Al. coch. 1915 Close to No.1267A
1267A E-a 145 Ch., 35x30x26 40 Good Formol C Sag 20 H.&E.. or. G 1915 Excellent CN.S.
1267B ?? E, 125 Good Formol p Sag. 20 H.&E. 1917 Tubal
5642 E, 11.5 Ch.. 33x30x17 Good Formol p Trans. 15 Al. coch. 1928 Right upper limb injured
5893 E.. 13.2 Good Formol C-P Trans. 20 Al. coch. 1929 Most advanced in group
6258 E. 14.0 Ch 48x35x25 Good Formol c—1= Trans. 10 H.&E. 1930 Median in group
6519 E.. 10.8* Exc Corrov acetic C-P Sag. 8 A1. coch. ? Least-advanced or middle third
6520 E., 14.2* Exc. Corros. acetic C-P Trans. 10 Al. coch. P Median in group. Ag added to slides 1-25
6521 E., 13.2* Exc. Corros. acetic C-P Trans. 8-18 Al. coch. ? Sections vary in thinness
6631 E., 13.0 Good Formol C-P Cor. 10 H.&E. 1932 Tubal. Advanced
6742 E, 11.0 Ch.,50x40x15 Good Formol C-P Trans. 12 H. & phlox. 1933 Good primary germ cells
6758 E., 12.8 Good Formol C-P Trans. 10 H. & phlox. 1933 Least—advanced third
7317 E, 10.0* Good P Cor. 10 H.&E. 1936 His embryo “Ru." Every third section
7436 E., 13.0 Good Formol C-P Cor. 30 Al. coch. 1937 Most-advanced third
8101 E., 13.0 Exc. Bouin C-P Trans. 10 H.&E. 1943 Operative
8118 E., 12.6 Exc. Bouin C-P Cor. 10 H.&E. 1943 Middle third
8253 E., 11.2 Ch.,30x20x10 Good Bouin C-P Cor. 10 Al. coch., phlox. 1944 Operative. Least advanced in group
8789 E., 11.7 Exc. Bouin C-P Sag. 10 Azan 1950
8969 E., 11.2 Exc. ? p Trans. 15 Azan 1919 Univ. Chicago No. H566
8998 E., 11.0 Exc. ? C-P Cor. 10 Azan 1952
9100 E., 12.0 Ch., 12x13x10 Exc. Formol-chrom. subl. C-P Sag. 10 Azan 1933 Univ. Chicago No. H1475
9282 E, 12.0 Ch., 16 Good Ale. p Trans. 15 Ag 1955 Mislaid


Carnegie Collection Embryos - Stage 17 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
353 E, 11.0 Ch., 40x35x20 Good Formalin P Coronal 10 (Stain - Haematoxylin Eosin) 1906 Very advanced
485 E, 13.0 Ch., 33x25 Exc. Formalin P Coronal 40 Al. coch. 1911 Injected (India ink)
544 E., 11.5 Ch., 30 Good Zenker-Formol P Sagittal 40 Al. coch. 1911 Operative Injected (India ink)
562 E, 13.0 Ch., 28x17x17 Poor Formalin P Sagittal 100 Al. coch. 1912 Advanced
623 E 10.1 Good Alc. P Transverse 20 H. & Congo red 1912 Operative. Median in group
695 E, 13.5 Ch., 40x40x17 Poor Formalin P Transverse 10 H. & Congo red 1913 Macerated
916 E, 11.0 Ch, 30x30x16 Good Bouin C Transverse 40 H.&E, or. G. 1915 Most-advanced third
940 E, 14.0 Ch, 28x23x21 Good Formalin C Transverse 40 H.&E, or. G. 1914 Advanced
1232 E, 14.5 Ch., 35x35x30 Poor Formalin P Coronal 40 Al. coch. 1915 Close to No.1267A
1267A E-a 145 Ch., 35x30x26 40 Good Formalin C Sagittal 20 (Stain - Haematoxylin Eosin). or. G 1915 Excellent CN.S.
1267B ?? E, 125 Good Formalin p Sagittal 20 (Stain - Haematoxylin Eosin) 1917 Tubal
5642 E, 11.5 Ch.. 33x30x17 Good Formalin p Transverse 15 Al. coch. 1928 Right upper limb injured
5893 E.. 13.2 Good Formalin C-P Transverse 20 Al. coch. 1929 Most advanced in group
6258 E. 14.0 Ch 48x35x25 Good Formalin C-P Transverse 10 (Stain - Haematoxylin Eosin) 1930 Median in group
6519 E.. 10.8* Exc Corrov acetic C-P Sagittal 8 Al. coch. ? Least-advanced or middle third
6520 E., 14.2* Exc. Corros. acetic C-P Transverse 10 Al. coch. P Median in group. Ag added to slides 1-25
6521 E., 13.2* Exc. Corros. acetic C-P Transverse 8-18 Al. coch. ? Sections vary in thinness
6631 E., 13.0 Good Formalin C-P Coronal 10 (Stain - Haematoxylin Eosin) 1932 Tubal. Advanced
6742 E, 11.0 Ch.,50x40x15 Good Formalin C-P Transverse 12 H. & phlox. 1933 Good primary germ cells
6758 E., 12.8 Good Formalin C-P Transverse 10 H. & phlox. 1933 Least—advanced third
7317 E, 10.0* Good P Coronal 10 (Stain - Haematoxylin Eosin) 1936 His embryo “Ru." Every third section
7436 E., 13.0 Good Formalin C-P Coronal 30 Al. coch. 1937 Most-advanced third
8101 E., 13.0 Exc. Bouin C-P Transverse 10 (Stain - Haematoxylin Eosin) 1943 Operative
8118 E., 12.6 Exc. Bouin C-P Coronal 10 (Stain - Haematoxylin Eosin) 1943 Middle third
8253 E., 11.2 Ch.,30x20x10 Good Bouin C-P Coronal 10 Al. coch., phlox. 1944 Operative. Least advanced in group
8789 E., 11.7 Exc. Bouin C-P Sagittal 10 Azan 1950
8969 E., 11.2 Exc. ? p Transverse 15 Azan 1919 Univ. Chicago No. H566
8998 E., 11.0 Exc. ? C-P Coronal 10 Azan 1952
9100 E., 12.0 Ch., 12x13x10 Exc. Formol-chrom. subl. C-P Sagittal 10 Azan 1933 Univ. Chicago No. H1475
9282 E, 12.0 Ch., 16 Good Ale. p Transverse 15 Ag 1955 Mislaid
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • Stain -
  • ? - unknown or not determined.


1987 - Stage 17 | Carnegie stage 17

Stage 18

Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Semi. ducts P.-M. duct (mm) Year Notes
109 E., 12.0* Ch.,30 Poor Alc. P Trans. 20 Al. coch. 1 0.4 1897 Tubal. Least—advanced third
144 E., 16.0* Ch, 40x30x30 Good Formol P Sag. 40 Al. coch. 3 0.85 1899 Most—advanced third
175 E., 13.0 Ch, 30x25x25 Poor Alc. P Trans. 20 Al. coch. 2 0.6 1900 Tubal. Partly macerated
296 E., 17.0 Poor Ale. P Cor. 20 Various 3 0.85 1905 Most—advanced third
317 E., 16.0 Good Formol P Cor. 20 H. &or.G. 2 0.7 1905 Middle third
351 E.,14.0* Good Formol P Cor. 250 Slightly carmine— 2 038 1904 Injected (Berlin blue)
406 E., 16.0 Ch., 40x40x40 Good Formol P Sag. 20 H.&E. 3 0.7 1907 Operative. Most—advanced third
423 E., 15.2 Good Formol—Zenker P Trans. 50 Carmine 3 0.85 1904
424 E., 172 Good Formol P Trans. 50 Carmine 3 10 1904 Double infection. Advanced
492 E, 16.8 Ch, 40 x 40 Exc. Zenker P Cor. 40 Al. coch. v 3 0.7 1911 Injected (India ink)
511 E., 160* Ch., 3?* 32x32 Good Ale. P Sag. 40 Al. coch. 3 1.1 1911 Head injured. Most advanced in group
670 E, 12.5 Poor Ale. P Sag. 50 H.&E. 3 10 1913 Tubal. Advanced
719 E, 15.0 Ch, 50x50x50 Good Formol P Trans 40 Al. coch. 2 0.6 1913 Median in group
733 E., Ch., 4Sx40x2S ISO Poor Formol P Sag. 50 Al. coch. 2 0.6 1913 Median in group
841 E. 15.0 Ch., 18 x 16x9 Good Formol P Cor.& Trans, 20 10 H.&E.. carmine 2 0.32 1914 Operative. Head cut separately
899 E, 160* Ch. 50 x 18 x IS Good Bouin P Sag. S0 Al. coch. 3 0,65 1914 Tubal Head injured
991 E. l?.0 Good Formal P Sag so R, V, Gieson 3 0.9 1914 Advanced
1909 E., 14.6 Good Formol P Cor. 20 Al. coch,or. G. 1 0.3 1917 Less advanced
2673 E.,15.5 Good Formol P Trans. 40 Al. coch. 2 0.52 1919 Median in group
4430 E., 14.0 Ch, 51 x40x21 Exc. Corros. acetic P Trans. 15 Al. coch,or. G. 3 0.9 1923 Most—advanced third
5542B E., 16.0 Ch, 37x32x25 Good Formol P Trans. 40 Al. coch. 2 0.7 1927 Other twin abnormal
5747 E, 15.2 Ch, 32x27x25 Poor Alc.—formol P Sag. 25 Al. coch. 2 0.25 1928 Least—advanced or middle third
5935A E, 13.5 Ch, 40x30x30 Good Formol P Cor. 40 Al. coch. 1 0.38 1929 Other twin stunted
6522 E, 13.2* Good Corros. acetic C—P Cor. 10 Al. coch. 3 0.8 7 Middle or most—advanced third
6524 E, 11.7* Exc. Corros. acetic C—P Trans. 10 Al. coch. 1 0.4 ? Least—advanced third
6525 E, 13.8* Exc. Corros. acetic C—P Sag 8 Al. coch. 2 0.42 ? Weak staining
6527 E, 14.4* Exc. Corros. acetic C—P Trans. 15 Al. coch. 2 0.67 ? Mechanical damage
6528 E, 13.4* Exc. Corros. acetic C—P Cor. 8 Al. coch. 1 0.33 ? Least—advanced third
6529 E, 15.6* Good Corros. acetic C—P Cor. 10 Al. coch. 2 0.4 .5 Middle third
6533 E, 12.5* Good Corros. acetic C—P Sag. 6, 8, 10 Al. coch. 2 0.45 ? Middle third
6551 E, 18.0 Poor Formol p Cor. 40 H.&E. 3 0.8 1932 Tubal
7707 E, 14.5 Ch ,37x32 Exc. Bouin C—P Trans. 10 H.&E, phlox. 2 0.54 1939 Operative. Middle third
8097 E, 15.5 Ch, 37x25x21 Good Formol C—P Trans. 10 H.&E. 1 0.19 1942 Least advanced in group
8172 E, 16.5 Exc. Bouin C—P Trans. 20 H.&E. 3 0.58 1943 Operative. Very advanced
8235 E, 14.0* Good Bouin C—P Sag. 10 H.&E., Mallory 2 0.25 1944 Tubal
8355 E, 15.0 Ch, 23 Exc. Formol C—P Cor. 10 Azan 1946 Tubal. Duplicated spinal cord caudally
8812 E, 12_9 Exc Formol C—P Trans. 10 H.&E. 1950 Rubella. Medical abortion. Midbrain punctured
8945 E, 13.9 Good Zenker p Trans. 8 Borax, carm. 1952 Univ. Chicago No. H 1254
9107 E, 17.0 Ch, 38x28x22 Good Bouin p Trans. 15 Borax, carm. 1918 Univ. Chicago No. H 516
9247 E, 15.0 Exc. Bouin C—P Sag. 8 Azan 1954 Tubal


Carnegie Collection Embryos - Stage 18 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Semi. ducts P.-M. duct (mm) Year Notes
109 E., 12.0* Ch.,30 Poor Alc. P Transverse 20 Al. coch. 1 0.4 1897 Tubal Least—advanced third
144 E., 16.0* Ch, 40x30x30 Good Formalin P Sagittal 40 Al. eoch. 3 0.85 1899 Most—advanced third
175 E., 13.0 Ch, 30x25x25 Poor Alc. P Transverse 20 Al. coch. 2 0.6 1900 Tubal Partly macerated
296 E., 17.0 Poor Ale. P Coronal 20 Various 3 0.85 1905 Most—advanced third
317 E., 16.0 Good Formalin P Coronal 20 (Stain - Haematoxylin Eosin) or. G. 2 0.7 1905 Middle third
351 E.,14.0* Good Formalin P Coronal 250 Slightly carmine— 2 038 1904 Injected (Berlin blue)
406 E., 16.0 Ch., 40x40x40 Good Formalin P Sagittal 20 (Stain - Haematoxylin Eosin) 3 0.7 1907 Operative. Most—advanced third
423 E., 15.2 Good Formol—Zenker P Transverse 50 Carmine 3 0.85 1904
424 E., 172 Good Formalin P Transverse 50 Carmine 3 10 1904 Double infection. Advanced
492 E, 16.8 Ch, 40 x 40 Exc. Zenker P Coronal 40 Al. coch. v 3 0.7 1911 Injected (India ink)
511 E., 160* Ch., 3?* 32x32 Good Ale. P Sagittal 40 Al. coch. 3 1.1 1911 Head injured. Most advanced in group
670 E, 12.5 Poor Ale. P Sagittal 50 (Stain - Haematoxylin Eosin) 3 10 1913 Tubal Advanced
719 E, 15.0 Ch, 50x50x50 Good Formalin P Trans 40 Al. coch. 2 0.6 1913 Median in group
733 E., Ch., 4Sx40x2S ISO Poor Formalin P Sagittal 50 Al. coch. 2 0.6 1913 Median in group
841 E. 15.0 Ch., 18 x 16x9 Good Formalin P Coronal & Trans, 20 10 (Stain - Haematoxylin Eosin), carmine 2 0.32 1914 Operative. Head cut separately
899 E, 160* Ch. 50 x 18 x IS Good Bouin P Sagittal S0 Al. coch. 3 0,65 1914 Tubal Head injured
991 E. l?.0 Good Formalin P Sag so R, V, Gieson 3 0.9 1914 Advanced
1909 E., 14.6 Good Formalin P Coronal 20 Al. coch,or. G. 1 0.3 1917 Less advanced
2673 E.,15.5 Good Formalin P Transverse 40 Al. coch. 2 0.52 1919 Median in group
4430 E., 14.0 Ch, 51 x40x21 Exc. Corros. acetic P Transverse 15 Al. coch,or. G. 3 0.9 1923 Most—advanced third
5542B E., 16.0 Ch, 37x32x25 Good Formalin P Transverse 40 Al. coch. 2 0.7 1927 Other twin abnormal
5747 E, 15.2 Ch, 32x27x25 Poor Alc.—formol P Sagittal 25 Al. coch. 2 0.25 1928 Least—advanced or middle third
5935A E, 13.5 Ch, 40x30x30 Good Formalin P Coronal 40 Al. coch. 1 0.38 1929 Other twin stunted
6522 E, 13.2* Good Corros. acetic C—P Coronal 10 Al. coch. 3 0.8 7 Middle or most—advanced third
6524 E, 11.7* Exc. Corros. acetic C—P Transverse 10 Al. coch. 1 0.4 ? Least—advanced third
6525 E, 13.8* Exc. Corros. acetic C—P Sagittal 8 Al. coch. 2 0.42 ? Weak staining
6527 E, 14.4* Exc. Corros. acetic C—P Transverse 15 Al. coch. 2 0.67 ? Mechanical damage
6528 E, 13.4* Exc. Corros. acetic C—P Coronal 8 Al. coch. 1 0.33 ? Least—advanced third
6529 E, 15.6* Good Corros. acetic C—P Coronal 10 Al. coch. 2 0.4 .5 Middle third
6533 E, 12.5* Good Corros. acetic C—P Sagittal 6, 8, 10 Al. coch. 2 0.45 ? Middle third
6551 E, 18.0 Poor Formalin p Coronal 40 (Stain - Haematoxylin Eosin) 3 0.8 1932 Tubal
7707 E, 14.5 Ch ,37x32 Exc. Bouin C—P Transverse 10 (Stain - Haematoxylin Eosin), phlox. 2 0.54 1939 Operative. Middle third
8097 E, 15.5 Ch, 37x25x21 Good Formalin C—P Transverse 10 (Stain - Haematoxylin Eosin) 1 0.19 1942 Least advanced in group
8172 E, 16.5 Exc. Bouin C—P Transverse 20 (Stain - Haematoxylin Eosin) 3 0.58 1943 Operative. Very advanced
8235 E, 14.0* Good Bouin C—P Sagittal 10 (Stain - Haematoxylin Eosin) Mallory 2 0.25 1944 Tubal
8355 E, 15.0 Ch, 23 Exc. Formalin C—P Coronal 10 Azan 1946 Tubal. Duplicated spinal cord caudally
8812 E, 12_9 Exc Formalin C—P Transverse 10 (Stain - Haematoxylin Eosin) 1950 Rubella. Medical abortion. Midbrain punctured
8945 E, 13.9 Good Zenker p Transverse 8 Borax, carm. 1952 Univ. Chicago No. H 1254
9107 E, 17.0 Ch, 38x28x22 Good Bouin p Transverse 15 Borax, carm. 1918 Univ. Chicago No. H 516
9247 E, 15.0 Exc. Bouin C—P Sagittal 8 Azan 1954 Tubal
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • Stain -
  • ? - unknown or not determined.

1987 - Stage 18 | Carnegie stage 18

Stage 19

Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Score Sex Year Notes
17 E, 18 Ch, 40x30x20 Poor Alc. P 50, 100 Al. carm. 16.5 M 1894
43 E, 16 Good Alc. P 50 Al. coch. 10 M 1 1894
293 E, 19 Poor Ale. P Sag. 50 Coch. 16.5 S 1905
390 E, 19 Good Formol? P Sag. 20, H.&E. 11.5 M 1906 Tubal. Injected

50

409 E.18 Ch, 50x40x40 Good Formol P Trans. 20 Copper, iron H. & erythrosin 14.5 M 1907
432 E..18.5 Ch , 45x35x20 Good Formol P Sag. 20 H. & Congo red 13.5 M 1910 Tubal
576 E. 17 Ch, 60x40 Good Formol P Sag. 15, 20 (Stain - Haematoxylin Eosin) 14.5 d 1912 Tubal
626 E., 21.5 Ch., 40x30x21 Good Formol P Trans. 100 Al. coch. 14_5 6 1913
6??8 E, 20 Ch, ca. 30 Poor Formol P Sag. 50 Al. coch. 12 9 1913 Head damaged
709 E, 19 Ch. 40x35x25 Poor Alc. P Car. 40 Al. coch, Lyons blue 15 49 1913
837 E. 21 Ch. 65X45x Good Formol P Sag. 40 Al. coch. 14.5 P 1914
1324 E., 18 50x30x18 Good Formol C Cor. 40 (Stain - Haematoxylin Eosin), aur, or. G 125 79 1915
1332 E., 19 Ch., 40x43x22 Poor Formol C Cor. 40 (Stain - Haematoxylin Eosin) aur, or. G. 15 M 1915
1390 E., 18 Ch, 40X38X15 Good Formol P Sag. 20 Al. coch. 10_5 M 1915 Tubal
1534 E., 13 Ch.,35x31.x25 Poor Formol P 53% 50 Al. coch. 13.5 F 1916 Protruding midbratn
2114 E., 19.3 Ch., 49x42x33 Good Formol P Trans. 40 A1. coch. 12 M 1918
4405 E., 15.5 Good Formol P Trans. 10 Coch, Mallory 13.5 <3 1923 Midbrain injured
4501 E, 18 Exc. Bouin P Trans. 15 Coch, or. G. 14.6 1924 Cystic left kidney
5609 E., 18 Exc. Formol P Cor. 25 A1. coch. 135 6
6150 E., 17 Ch., 40x39x30 Good Bouin C-P Trans. 15 (Stain - Haematoxylin Eosin) 16.5 M 1930 Tubal
6824 E., 18.5 Ch., 45x40x25 Good Formol C-P Sag. 12 (Stain - Haematoxylin Eosin) 14.5 F 1933
7900 E., 16.5 Good Bouin C-P Sag. 20 (Stain - Haematoxylin Eosin), phlox. 11.5 . . 1941 Tubal
8092 E., 16.3 Ch., 52 x 47 Exc. Bouin C-P Trans. 20 (Stain - Haematoxylin Eosin), phlox. 13 M 1942
8913 E.,? Ch, 34 Poor Formol p Trans. 10 Alan . 7 1951 Rubella. Medical abortion. Isolated head damaged
8965 E, 19.1 Ch, 42x32x19 Good Formol—Zenker C-P Trans, 10 Borax, carm, or. G. 1952 Univ. Chicago No. H 173
9097 E, 21 Exc. Fo1rno1—glucose C-P Cor. 10 Azan ? . ? 1930 Univ. Chicago No H 1380
9113 E, 185 Ch, 24 Exc. Formol C-P Trans. 10 Alan > 6 1953 Rubella. Medical abortion
9325 E, 17.0 Ch, 32x28x20 Good Formol —acetic p Trans. 15& 8-10 Azan & Ag ? - 1955 Tubal
Carnegie Collection - Stage 19 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Score Sex Year Notes
17 E, 18 Ch, 40x30x20 Poor Alc. P 50, 100 Al. carm. 16.5 Male 1894
43 E, 16 Good Alc. P 50 Al. coch. 10 Male 1894
293 E, 19 Poor Ale. P Sagittal 50 Coch. 16.5 S 1905
390 E, 19 Good Formol? P Sagittal 20, (Stain - Haematoxylin Eosin) 11.5 Male 1906 Tubal Injected

50

409 E.18 Ch, 50x40x40 Good Formalin P Transverse 20 Copper, iron H. & erythrosin 14.5 Male 1907
432 E..18.5 Ch , 45x35x20 Good Formalin P Sagittal 20 H. & Congo red 13.5 Male 1910 Tubal
576 E. 17 Ch, 60x40 Good Formalin P Sagittal 15, 20 (Stain - Haematoxylin Eosin) 14.5 d 1912 Tubal
626 E., 21.5 Ch., 40x30x21 Good Formalin P Transverse 100 Al. coch. 14_5 6 1913
6??8 E, 20 Ch, ca. 30 Poor Formalin P Sagittal 50 Al. coch. 12 9 1913 Head damaged
709 E, 19 Ch. 40x35x25 Poor Alc. P Coronal 40 Al. coch, Lyons blue 15 49 1913
837 E. 21 Ch. 65x45x Good Formalin P Sagittal 40 Al. coch. 14.5 P 1914
1324 E., 18 50x30x18 Good Formalin C Coronal 40 (Stain - Haematoxylin Eosin), aur, or. G 125 79 1915
1332 E., 19 Ch., 40x43x22 Poor Formalin C Coronal 40 (Stain - Haematoxylin Eosin) aur, or. G. 15 Male 1915
1390 E., 18 Ch, 40x38x15 Good Formalin P Sagittal 20 Al. coch. 10_5 Male 1915 Tubal
1534 E., 13 Ch.,35x31x25 Poor Formalin P 53% 50 Al. coch. 13.5 F 1916 Protruding midbrain
2114 E., 19.3 Ch., 49x42x33 Good Formol P Transverse 40 A1. coch. 12 M 1918
4405 E., 15.5 Good Formalin P Transverse 10 Coch, Mallory 13.5 <3 1923 Midbrain injured
4501 E, 18 Exc. Bouin P Transverse 15 Coch, or. G. 14.6 1924 Cystic left kidney
5609 E., 18 Exc. Formalin P Coronal 25 A1. coch. 13.5 Male
6150 E., 17 Ch., 40x39x30 Good Bouin C-P Transverse 15 (Stain - Haematoxylin Eosin) 16.5 Male 1930 Tubal
6824 E., 18.5 Ch., 45x40x25 Good Formalin C-P Sagittal 12 (Stain - Haematoxylin Eosin) 14.5 Female 1933
7900 E., 16.5 Good Bouin C-P Sagittal 20 (Stain - Haematoxylin Eosin), phlox. 11.5 . . 1941 Tubal
8092 E., 16.3 Ch., 52 x 47 Exc. Bouin C-P Transverse 20 (Stain - Haematoxylin Eosin), phlox. 13 Male 1942
8913 E.,? Ch, 34 Poor Formalin p Transverse 10 Alan . 7 1951 rubella. Medical abortion. Isolated head damaged
8965 E, 19.1 Ch, 42x32x19 Good Formol—Zenker C-P Transverse 10 Borax, carm, or. G. 1952 Univ. Chicago No. H 173
9097 E, 21 Exc. Formol—glucose C-P Coronal 10 Azan ? . ? 1930 Univ. Chicago No H 1380
9113 E, 185 Ch, 24 Exc. Formalin C-P Transverse 10 Alan > 6 1953 Rubella. Medical abortion
9325 E, 17.0 Ch, 32x28x20 Good Formalin —acetic p Transverse 15& 8-10 Azan & Ag ? - 1955 Tubal
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • Stain -
  • ? - unknown or not determined.

1987 - Stage 19 | Carnegie stage 19

Stage 20

Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Point Score Sex Year Notes
240 E, 20 Ch, 50x40x30 Poor Formol P Cor. 20 Iron H. 27 d 19??
256 E, 21 poor A1c p Sag. 25 Coch. 23 M 1904 Tubal. Partial anencephaly
353 E, 20 Poor A1c P Sag. 20 H. & Congo red 22,5 M 1906
431 E, 19 Ch, 30x25x25 Good Formol P Sag. 20 H. & Congo red 25,5 M 1908 Tubal
437 E, 23 Ch., 80x60x50 Poor Formol P Sag. 50 Coch 24 M 193?
453 E, 23 Ch, 60x40x30 Poor Formol P Sag. 20 H. & Congo red 23-5 ? 1910 Injected
460 E, 21 Exc. Bichlor. acetic P Trans. 40 H.&E., coch, 24.5 M 1910 injected
462 E, 20 Ch, 50x40x30 Exc. Formol P Trans. 40 Al, coch 23.5 F 1910
635B E, 22 Poor Ale P Trans 50 Al, coch 26.5 M 1913
657 E, 25 Ch, 35x20x15 Poor Formol C Sag 40 Al, coch 26.5 M 1913 Tubal
966 E, 23 Ch, 51x38x13 Exc Bichlor. acetic P Cor 40 H.&E, aur, or. G 25 M 1911 Tubal
1134B E, 23 Poor Formol p Sag 100 Al. coch., 22 - 1915
1266 E, 23.1 Poor Formol C-P Sag. 25 Al. coch., H&E aur, or G 20.5 F 191?
2393 Ch, 61.5x50x35 Poor
3527 E., 22 Ch. 32x30x10 Good Formol P Sag. 25 Al. coch., 28 ? 1921
4059 E, 21.6 Good Formol P Cor. 15 Al. coch., Mallory 29.5 $ 1922
4148 E, 21 Ch. 45x34x30 Good Formol p Con 15 A1. coch., Mallory 19 ? 1922
4361 E, 22 Ch., 52x42x23 poor Formol 9 Trans. 20 Coch. 24 8 1923
6202 E, 21 Ch., 35x35x22 Exc Bouin P Sag. 20 H.&E 20.5 8 1930 Tubal
6426 E 21.5 Good Formol C—P Trans. 20 H&E - 21 3 1931
7274 E, 18.5 Ch., 48x44x35 Exc Bouin C—P Trans. 20 H.&E., phlox. 20 M 1936
7906 E19.5 Exc Bouin C—P Cor. 20 H.&E. 22 8 1941 Left renal agenesis
8517 E., 20.8 Exc. Bouin C—P Cor. 20 H.&E. 24 8 1943
8226 E, 18.0 Exc. Bouin C—P Sag 10 Alan ? 3 1944
Carnegie Collection - Stage 20 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Point Score Sex Year Notes
240 E, 20 Ch, 50x40x30 Poor Formalin P Coronal 20 Iron H. 27 d 19??
256 E, 21 poor Alc p Sagittal 25 Coch. 23 M 1904 Tubal. Partial anencephaly
353 E, 20 Poor Alc P Sagittal 20 H. & Congo red 22,5 M 1906
431 E, 19 Ch, 30x25x25 Good Formalin P Sagittal 20 H. & Congo red 25,5 M 1908 Tubal
437 E, 23 Ch., 80x60x50 Poor Formalin P Sagittal 50 Coch 24 M 193?
453 E, 23 Ch, 60x40x30 Poor Formalin P Sagittal 20 H. & Congo red 23-5 ? 1910 Injected
460 E, 21 Exc. Bichlor. acetic P Transverse 40 (Stain - Haematoxylin Eosin), coch, 24.5 M 1910 injected
462 E, 20 Ch, 50x40x30 Exc. Formalin P Transverse 40 Al, coch 23.5 F 1910
635B E, 22 Poor Alc P Transverse 50 Al, coch 26.5 M 1913
657 E, 25 Ch, 35x20x15 Poor Formalin C Sagittal 40 Al, coch 26.5 M 1913 Tubal
966 E, 23 Ch, 51x38x13 Exc Bichlor. acetic P Coronal 40 (Stain - Haematoxylin Eosin), aur, or. G 25 M 1911 Tubal
1134B E, 23 Poor Formalin p Sagittal 100 Al. coch., 22 - 1915
1266 E, 23.1 Poor Formalin C-P Sagittal 25 Al. coch., (Stain - Haematoxylin Eosin) aur, or G 20.5 F 191?
2393 Ch, 61.5x50x35 Poor
3527 E., 22 Ch. 32x30x10 Good Formalin P Sagittal 25 Al. coch., 28 ? 1921
4059 E, 21.6 Good Formalin P Coronal 15 Al. coch., Mallory 29.5 $ 1922
4148 E, 21 Ch. 45x34x30 Good Formalin p Coronal 15 A1. coch., Mallory 19 ? 1922
4361 E, 22 Ch., 52x42x23 poor Formalin 9 Transverse 20 Coch. 24 8 1923
6202 E, 21 Ch., 35x35x22 Exc Bouin P Sagittal 20 (Stain - Haematoxylin Eosin) 20.5 8 1930 Tubal
6426 E 21.5 Good Formalin C—P Transverse 20 (Stain - Haematoxylin Eosin) 21 3 1931
7274 E, 18.5 Ch., 48x44x35 Exc Bouin C—P Transverse 20 (Stain - Haematoxylin Eosin), phlox. 20 M 1936
7906 E19.5 Exc Bouin C—P Coronal 20 (Stain - Haematoxylin Eosin) 22 8 1941 Left renal agenesis
8517 E., 20.8 Exc. Bouin C—P Coronal 20 (Stain - Haematoxylin Eosin) 24 8 1943
8226 E, 18.0 Exc. Bouin C—P Sagittal 10 Alan ? 3 1944
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • Stain -
  • ? - unknown or not determined.


1987 - Stage 20 | Carnegie stage 20

Stage 21

Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Point Score Sex Year Notes
22 E, 20 Ch, 35x30x30 Good Alc. P Trans. 50 Al. coch. 34.5 F 1895
57 E, 23 Ch., ca. 30 Poor Alc. P Sag. 50 Al. coch. 36 M 1896
128 E, 20 Ch., 50x43 Good Formol P Cor. 50 Al. coch. 33 F 1898
229 E, 19 Poor Alc. P Sag. 50 Al. coch. 33 F 1903
349 E, 24 Good Zenker C Cor. 250 Unstained 36 ? 1905 Double vascular injection
455 E, 24 Ch., 42x34x20 Good Alc. P Trans. 30 (Stain - Haematoxylin Eosin) 36.5 M 1910
632 E, 24 Ch., 60x50x30 Good Bichlor. acetic P Sag. 40, 100, 250 Al. coch. 33 F 1913 Injected
903C E, 23.5 Good Formol P Trans. 40 Al. coch. 38.5 F 1914
1008 E, 26,4 Good Formol P Sag. 40 Al. coch. 39 ?? 1914
1358F E, 23 Good Formol P Sag. 40 Al. coch. 37.5 F 1916
2937 E,, 24.2 Good Bouin P Trans. 50 (Stain - Haematoxylin Eosin) aur., or. G. 39 F 1920
3167 E., 24.5 Ch., 60x50x40 Poor Bichlor, acetic, formol P Trans. 20 Al. coch. 32 M 1920
4090 E, 22.2 Ch.. 66x46x30 Good Formol P Trans. 40 Al. coch. 30 F 1922
4160 E,25 Poor Formol P Sag. 25 (Stain - Haematoxylin Eosin) 39 M 1923 Tubal
4960 E.22 Ch,, 47x42x28 Good Formol P Trans. 15 Al. coch., Mallory 31.5 F 1925
5??6 E. 215 Good Formol P Sag. 20 (Stain - Haematoxylin Eosin) 34 F 1927
6531 E,22 Poor Glacial acetic, C-P Trans. 10 (Stain - Haematoxylin Eosin) 31.5 F 1931 Leitz Collection
72S4 E,225 Exc Bouin C-P Trans. 20 (Stain - Haematoxylin Eosin) 33.5 M 1936
7592 E,22-> Exc. Bouin C-P Trans. 20 (Stain - Haematoxylin Eosin) 36 F 1937
1*64 E., 24 Exc, Formol C-P Frontal 20 (Stain - Haematoxylin Eosin) 32.5 M 1941
8553 E., 22 Exc Bouin C-P Trans. 12 (Stain - Haematoxylin Eosin) 38 F 1947
9614 E,,22 5 Exc Bouin P Cor. 10 &15 Azan ? ? 1958 Rubella. Hysterectomy
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • Stain -
  • ? - unknown or not determined.


Carnegie Collection - Stage 21 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Point Score Sex Year Notes
22 E, 20 Ch, 35x30x30 Good Alc. P Transverse 50 Al. coch. 34.5 Female 1895
57 E, 23 Ch., ca. 30 Poor Alc. P Sagittal 50 Al. coch. 36 Male 1896
128 E, 20 Ch., 50x43 Good Formalin P Coronal 50 Al. coch. 33 Female 1898
229 E, 19 Poor Alc. P Sagittal 50 Al. coch. 33 Female 1903
349 E, 24 Good Zenker C Coronal 250 Unstained 36 ? 1905 Double vascular injection
455 E, 24 Ch., 42x34x20 Good Alc. P Transverse 30 (Stain - Haematoxylin Eosin) 36.5 Male 1910
632 E, 24 Ch., 60x50x30 Good Bichlor. acetic P Sagittal 40, 100, 250 Al. coch. 33 Female 1913 Injected
903C E, 23.5 Good Formalin P Transverse 40 Al. coch. 38.5 Female 1914
1008 E, 26,4 Good Formalin P Sagittal 40 Al. coch. 39 ?? 1914
1358F E, 23 Good Formalin P Sagittal 40 Al. coch. 37.5 Female 1916
2937 E,, 24.2 Good Bouin P Transverse 50 (Stain - Haematoxylin Eosin) aur., or. G. 39 Female 1920
3167 E., 24.5 Ch., 60x50x40 Poor Bichlor, acetic, formol P Transverse 20 Al. coch. 32 Male 1920
4090 E, 22.2 Ch.. 66x46x30 Good Formalin P Transverse 40 Al. coch. 30 Female 1922
4160 E,25 Poor Formalin P Sagittal 25 (Stain - Haematoxylin Eosin) 39 Male 1923 Tubal
4960 E.22 Ch,, 47x42x28 Good Formalin P Transverse 15 Al. coch., Mallory 31.5 Female 1925
5??6 E. 215 Good Formalin P Sagittal 20 (Stain - Haematoxylin Eosin) 34 Female 1927
6531 E,22 Poor Glacial acetic, C-P Transverse 10 (Stain - Haematoxylin Eosin) 31.5 Female 1931 Leitz Collection
7254 E,225 Exc Bouin C-P Transverse 20 (Stain - Haematoxylin Eosin) 33.5 Male 1936
7592 E,22-> Exc. Bouin C-P Transverse 20 (Stain - Haematoxylin Eosin) 36 Female 1937
7864 E., 24 Exc, Formalin C-P Frontal 20 (Stain - Haematoxylin Eosin) 32.5 Male 1941
8553 E., 22 Exc Bouin C-P Transverse 12 (Stain - Haematoxylin Eosin) 38 Female 1947
9614 E,,22 5 Exc Bouin P Coronal 10 &15 Azan ? ? 1958 Rubella. Hysterectomy
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • Stain -
  • ? - unknown or not determined.

1987 - Stage 21 | Carnegie stage 21

Stage 22

Carnegie Collection - Stage 22 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Point Score Sex Year Notes
392 E., 23 Ch., 45x45x25 Poor ... P Sagittal 50 Al. coch. 42 Female 1907 Brödel Collection. Injected
405 E., 26 Good Formol C Sagittal 40 Carmine 42.5 Male 1907
464 E.,26 Ch., 45x40x30 Good Formol? alc? P Sag. 100 Al. coch. 44.5 Male 1910
584A E.,25 Ch., 50x42x40 Poor Formol P Sagittal 50 Al. coch. 41 ? 1913
630 E., 25 Poor Formol P Transverse 100 Al. coch. 46 Male 1913
840 E, 24.8 Good Formol P Transverse 50 Al. coch. 44.5 Female 1914
875 E, 27 Ch., 40x28x22 Good Formol P Sagittal 40 Al. coch. 45 Male 1914
895 E., 26 Ch., 67x62x54 Good Formol P Transverse 25 Al. coch. 46.5 Female 1914
1315 E.,25 Good Formol P Sagittal 50 Al. coch. 40.5 Female 1915 Spina bifida and anencephaly
1458 E., 27.5 Ch, 45x45x30 Exc. Formol C Sagittal 50 (Stain - Haematoxylin Eosin) aur, or. G. 45.5 Male 1916
1894 E, 24.6 Good Formol c Sagittal 40,80 (Stain - Haematoxylin Eosin) aur, or. G. 41 Female 1917
2206 E, 27 Ch, 50x30x18 Poor Formol p Transverse 40 (Stain - Haematoxylin Eosin) 44.5 Male 1918
3681 E, 26.3 Ch, 36x36x34 Good Formol p Transverse 25 Al. coch. 44.5 Male 1921
4304 E,25 Ch, 66x45x45 Good Bouin p Transverse 20 (Stain - Haematoxylin Eosin) 44.5 Female 1923 Injected
4339 E, 24.5 Good Formol p Transverse 15 Al. coch, Mallory 46,5 Female 1923
4476 E., 26.2 Good Bouin p Transverse 40 (Stain - Haematoxylin Eosin) 46 Female 1923 Tubal
4638 E, 23.4 Exc. Bouin p Transverse 15,20 Al. coch, or. G. 41.5 Male 1924
6701 E, 24 Poor Formol p Coronal 20 (Stain - Haematoxylin Eosin) 41 Female 1933
6832 E, 25.8 Exc. Bouin C-P Coronal 20 (Stain - Haematoxylin Eosin) 42 Female 1934
8394 E, 25.3 Ch, 48x50x34 Exc. Bouin C-P Transverse 20 (Stain - Haematoxylin Eosin), Masson 44.5 Female 1946
8948 E, 26.7 Ch, 61x51x50 Poor Formol-Zenker p Transverse 15 Ag ? ? 1952


Carnegie Collection - Stage 22 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Point Score Sex Year Notes
392 E., 23 Ch., 45x45x25 Poor ... P Sagittal 50 Al. coch. 42 Female 1907 Brödel Collection. Injected
405 E., 26 Good Formalin C Sagittal 40 Carmine 42.5 Male 1907
464 E.,26 Ch., 45x40x30 Good Formol? alc? P Sag. 100 Al. coch. 44.5 Male 1910
584A E.,25 Ch., 50x42x40 Poor Formalin P Sagittal 50 Al. coch. 41 ? 1913
630 E., 25 Poor Formalin P Transverse 100 Al. coch. 46 Male 1913
840 E, 24.8 Good Formalin P Transverse 50 Al. coch. 44.5 Female 1914
875 E, 27 Ch., 40x28x22 Good Formalin P Sagittal 40 Al. coch. 45 Male 1914
895 E., 26 Ch., 67x62x54 Good Formalin P Transverse 25 Al. coch. 46.5 Female 1914
1315 E.,25 Good Formalin P Sagittal 50 Al. coch. 40.5 Female 1915 Spina bifida and anencephaly
1458 E., 27.5 Ch, 45x45x30 Exc. Formalin C Sagittal 50 (Stain - Haematoxylin Eosin) aur, or. G. 45.5 Male 1916
1894 E, 24.6 Good Formalin c Sagittal 40,80 (Stain - Haematoxylin Eosin) aur, or. G. 41 Female 1917
2206 E, 27 Ch, 50x30x18 Poor Formalin p Transverse 40 (Stain - Haematoxylin Eosin) 44.5 Male 1918
3681 E, 26.3 Ch, 36x36x34 Good Formalin p Transverse 25 Al. coch. 44.5 Male 1921
4304 E,25 Ch, 66x45x45 Good Bouin p Transverse 20 (Stain - Haematoxylin Eosin) 44.5 Female 1923 Injected
4339 E, 24.5 Good Formalin p Transverse 15 Al. coch, Mallory 46,5 Female 1923
4476 E., 26.2 Good Bouin p Transverse 40 (Stain - Haematoxylin Eosin) 46 Female 1923 Tubal
4638 E, 23.4 Exc. Bouin p Transverse 15,20 Al. coch, or. G. 41.5 Male 1924
6701 E, 24 Poor Formalin p Coronal 20 (Stain - Haematoxylin Eosin) 41 Female 1933
6832 E, 25.8 Exc. Bouin C-P Coronal 20 (Stain - Haematoxylin Eosin) 42 Female 1934
8394 E, 25.3 Ch, 48x50x34 Exc. Bouin C-P Transverse 20 (Stain - Haematoxylin Eosin), Masson 44.5 Female 1946
8948 E, 26.7 Ch, 61x51x50 Poor Formol-Zenker p Transverse 15 Ag ? ? 1952
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • Stain -
  • ? - unknown or not determined.


1987 - Stage 22 | Carnegie stage 22

Stage 23

Carnegie Collection - Stage 23 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Point Score Sex Year Notes
45 E,28 Ch, 40x35x20 Poor ? P Coronal/Transverse 50 Al. coch. 51.5 Female 1895
75 E,30 Good Alc. P Sagittal 50 Coch. 57 Male 1897
86 E,30 Good ? ? Coronal 50 Coch. Male 1897 May be an early fetus
100 E,27 Poor ? P Sagittal 50 Al. coch. 57.5 ? 1897
108 E, 28 (est.) Poor Piurosulph. acid P Sagittal 45 Borax carm. 52.5 Male 1897
227 E30 Ch, 60x40x20 Poor Formol P Sagittal 50, 100 Al. coch. 54 Female 1903
417 E,32 Ch., 0x60x40 Good Formol P Transverse 100 Al. coch. 58.5 Female 1907
756A E, 27 Ch. 60x45x35 Good Formol P Coronal 50 Al. coch. 56 Male 1913
882 E , 28 Ch, 80x80x40 Good Formol P Transverse 40 Multiple 53 8 1913
950 E, 29 Good Formol P Transverse 50 Al. coch. 54 Male 1914
1199 E.,26 Ch,, 60x40x30 Good Formol C Coronal 40 (Stain - Haematoxylin Eosin) aur , or. G. 54.5 Male 1915
1535 E , 28 Ch. 50x45 x15 Poor Formol P Transverse 40 (Stain - Haematoxylin Eosin) 495 Female 1916
1945 E., 27.3 Ch., 83x53x22.5 Good Formol C-P Transverse 50 (Stain - Haematoxylin Eosin) aur., or. G. 48 Male 1917
2561 E., 27 .5 Good Formol C-P Transverse 25 (Stain - Haematoxylin Eosin) aur., or. G. 48 .5 Male 1919
4205 E., 29.5 Good Bouin P Transverse 50 A1. coch. 55.5 Female 1923
4289 E., 32.2 Ch., 52x35x25 Good Formol P Transverse 15, 20 A1. coch., Mallory 59 Female 1923
4525 E., 30 Good Formol P Sagittal 20 (Stain - Haematoxylin Eosin) 57 Male 1924
4570 E, 30.7 Ch., 52X50X28 Exc. Bouin P Transverse. 15 (Stain - Haematoxylin Eosin) , phlox. 55 Male 1924
5154 E.,32 Good Bouin P Transverse 20 (Stain - Haematoxylin Eosin) 59.5 S 1926
5422 E., 27 Good Formol P Sagittal 40 (Stain - Haematoxylin Eosin) 52.5 Female 1927
5621A E., 27.5 Good Formol P Transverse 20 (Stain - Haematoxylin Eosin) 52.5 Male 1927 Other twin has spina bifida and fused kidneys
5725 E, 23 Good Formol P Coronal 25 (Stain - Haematoxylin Eosin) aur., or. G. 50.5 Female 1928
6573 E,31.5 Good Bouin C Transverse 20 (Stain - Haematoxylin Eosin) 58.5 Female 1932
7425 E, 27 Exc. Bouin C-P Coronal 20 (Stain - Haematoxylin Eosin) 47 Female 1937 Ag added
9226 E, 31 Exc. Formol C—P Transverse 12 Azan ? Female 1954
D.122 E, 27 Exc. ? ? Transverse 19 Ag ? ? 1976 Yntema and Truex


Carnegie Collection - Stage 23 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Point Score Sex Year Notes
45 E,28 Ch, 40x35x20 Poor ? P Coronal/Transverse 50 Al. coch. 51.5 Female 1895
75 E,30 Good Alc. P Sagittal 50 Coch. 57 Male 1897
86 E,30 Good ? ? Coronal 50 Coch. Male 1897 May be an early fetus
100 E,27 Poor ? P Sagittal 50 Al. coch. 57.5 ? 1897
108 E, 28 (est.) Poor Piurosulph. acid P Sagittal 45 Borax carm. 52.5 Male 1897
227 E30 Ch, 60x40x20 Poor Formalin P Sagittal 50, 100 Al. coch. 54 Female 1903
417 E,32 Ch., 0x60x40 Good Formalin P Transverse 100 Al. coch. 58.5 Female 1907
756A E, 27 Ch. 60x45x35 Good Formalin P Coronal 50 Al. coch. 56 Male 1913
882 E , 28 Ch, 80x80x40 Good Formalin P Transverse 40 Multiple 53 8 1913
950 E, 29 Good Formol P Transverse 50 Al. coch. 54 Male 1914
1199 E.,26 Ch,, 60x40x30 Good Formalin C Coronal 40 (Stain - Haematoxylin Eosin) aur , or. G. 54.5 Male 1915
1535 E , 28 Ch. 50x45 x15 Poor Formalin P Transverse 40 (Stain - Haematoxylin Eosin) 495 Female 1916
1945 E., 27.3 Ch., 83x53x22.5 Good Formalin C-P Transverse 50 (Stain - Haematoxylin Eosin) aur., or. G. 48 Male 1917
2561 E., 27 .5 Good Formalin C-P Transverse 25 (Stain - Haematoxylin Eosin) aur., or. G. 48 .5 Male 1919
4205 E., 29.5 Good Bouin P Transverse 50 A1. coch. 55.5 Female 1923
4289 E., 32.2 Ch., 52x35x25 Good Formalin P Transverse 15, 20 A1. coch., Mallory 59 Female 1923
4525 E., 30 Good Formalin P Sagittal 20 (Stain - Haematoxylin Eosin) 57 Male 1924
4570 E, 30.7 Ch., 52X50X28 Exc. Bouin P Transverse. 15 (Stain - Haematoxylin Eosin) , phlox. 55 Male 1924
5154 E.,32 Good Bouin P Transverse 20 (Stain - Haematoxylin Eosin) 59.5 Male 1926
5422 E., 27 Good Formalin P Sagittal 40 (Stain - Haematoxylin Eosin) 52.5 Female 1927
5621A E., 27.5 Good Formalin P Transverse 20 (Stain - Haematoxylin Eosin) 52.5 Male 1927 Other twin has spina bifida and fused kidneys
5725 E, 23 Good Formalin P Coronal 25 (Stain - Haematoxylin Eosin) aur., or. G. 50.5 Female 1928
6573 E,31.5 Good Bouin C Transverse 20 (Stain - Haematoxylin Eosin) 58.5 Female 1932
7425 E, 27 Exc. Bouin C-P Coronal 20 (Stain - Haematoxylin Eosin) 47 Female 1937 Ag added
9226 E, 31 Exc. Formalin C—P Transverse 12 Azan ? Female 1954
D.122 E, 27 Exc. ? ? Transverse 19 Ag ? ? 1976 Yntema and Truex
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • Stain -
  • ? - unknown or not determined.


1987 - Stage 23 | Carnegie stage 23




1987 Stages: Introduction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | References | Appendix 1 | Appendix 2 | Historic Papers | Embryonic Development
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Cite this page: Hill, M.A. (2024, March 28) Embryology 1987 Developmental Stages In Human Embryos - Appendix 1. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/1987_Developmental_Stages_In_Human_Embryos_-_Appendix_1

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