Category:Carnegie Embryo 7801

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This Embryology category includes pages and images that relate to the Carnegie Collection Embryo No. 7801. This embryo was classified as Carnegie stage 6 occurring during Week 2.

Serial No.	Grade	Fixative	Embedding Medium	Thinness (µm)	Stain	Year	Notes
7801	Exc.	Bouin	C—P	8	(Stain - Haematoxylin Eosin)	1940	Heuser CH. Rock J. and Hertig AT. Two human embryos showing early stages of the definitive yolk sac. (1945) Contrib. Embryol., Carnegie Inst. Wash. Publ. 557, 31: 85-99.

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 ↑ Brewer JI. A normal human ovum in a stage preceding the primitive streak (The Edwards-Jones-Brewer ovum). (1937) Amer. J Anat., 61: 429-481. ↑ Brewer JI. A human embryo in the bilaminar blastodisc stage (The Edwards-Jones-Brewer ovum). (1938) Contrib. Embryol., Carnegie Inst. Wash. Publ. 496, 27: 85-93.

Week:	1	2	3	4	5	6	7	8
Carnegie stage:	1 2 3 4	5 6	7 8 9	10 11 12 13	14 15	16 17	18 19	20 21 22 23

Historic Papers: 1909 | 1925 | 1937

Described in detail and illustrated by Heuser, Rock, and Hertig (1945).^[1]

Hysterectomy Posterior wall of uterus. “The primitive villi are short and stubby; a few reach a length of about 0.25 mm.” Chorion, 2.6 x 1.9 x 1.4 mm. Chorionic cavity, 1.3 x 1.1 x 0.8 mm. Embryonic disc, 0.04 x 0.22 x 0.253 mm. Primitive streak, 0.04 mm. “Axial differentiation is just appearing.” “In this embryo the site of the future [cloacal] membrane seems indicated, but not the structure itself.” Probably no allantoic duct. Presumed age, 13-13.5 days. Median projection published (ibid., plate 3).

See also later O'Rahilly and Müller (1987)^[2] (figs. 6-5 to 6-10).

References

↑ Heuser CH. Rock J. and Hertig AT. Two human embryos showing early stages of the definitive yolk sac. (1945) Contrib. Embryol., Carnegie Inst. Wash. Publ. 557, 31: 85-99.
↑ O'Rahilly R. and Müller F. Developmental Stages in Human Embryos. Contrib. Embryol., Carnegie Inst. Wash. 637 (1987).

Pages in category 'Carnegie Embryo 7801'

The following 6 pages are in this category, out of 6 total.

1

1987 Developmental Stages In Human Embryos - Stage 6

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P

Media in category 'Carnegie Embryo 7801'

The following 11 files are in this category, out of 11 total.

Hertig1945d fig16.jpg 627 × 992; 167 KB
Hertig1945d plate04.jpg 1,280 × 1,964; 438 KB
Hertig1946b fig04.jpg 800 × 1,290; 244 KB
Hertig1946b fig04a.jpg 800 × 667; 128 KB
Hertig1946b fig04b.jpg 800 × 613; 115 KB
Hertig1946b fig08.jpg 800 × 652; 134 KB
Hertig1956 plate07.jpg 1,481 × 2,215; 556 KB
Hertig1956 plate08.jpg 1,280 × 1,987; 497 KB
Stage6 bf01.jpg 646 × 800; 60 KB
Stage6 bf02.jpg 638 × 800; 92 KB
Stage6 bf03.jpg 646 × 800; 65 KB

[Brewer1937-1] Brewer JI. A normal human ovum in a stage preceding the primitive streak (The Edwards-Jones-Brewer ovum). (1937) Amer. J Anat., 61: 429-481.

[Brewer1938-2] Brewer JI. A human embryo in the bilaminar blastodisc stage (The Edwards-Jones-Brewer ovum). (1938) Contrib. Embryol., Carnegie Inst. Wash. Publ. 496, 27: 85-93.

[3] Heuser CH. Rock J. and Hertig AT. Two human embryos showing early stages of the definitive yolk sac. (1945) Contrib. Embryol., Carnegie Inst. Wash. Publ. 557, 31: 85-99.

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

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