Carnegie stage table: Difference between revisions

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== Carnegie Stage Table ==
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Revision as of 15:38, 7 June 2011

Stage
Days (approx)
Size
(mm)
Images
(not to scale)
Events
1
1
(week 1)
0.1 - 0.15
Link=Carnegie_stage_1
fertilized oocyte, zygote, pronuclei
2
2 - 3
0.1 - 0.2
Link=Carnegie_stage_2
morula cell division with reduction in cytoplasmic volume, blastocyst formation of inner and outer cell mass
3
4 - 5
0.1 - 0.2
Link=Carnegie_stage_3
loss of zona pellucida, free blastocyst
4
5 - 6
0.1 - 0.2
Link=Carnegie_stage_4
attaching blastocyst
5
7 - 12
(week 2)
0.1 - 0.2
Link=Carnegie_stage_5
implantation
6
13 - 15
0.2
Link=Carnegie_stage_6
extraembryonic mesoderm, primitive streak, gastrulation
7
15 - 17
(week 3)
0.4
Link=Carnegie_stage_7
gastrulation, notochordal process
8
17 - 19
1.0 - 1.5
Link=Carnegie_stage_8
primitive pit, notochordal canal
9
19 - 21
1.5 - 2.5
Link=Carnegie_stage_9
Somitogenesis Somite Number 1 - 3 neural folds, cardiac primordium, head fold
10
22 - 23
(week 4)
2 - 3.5
Link=Carnegie_stage_10
Somite Number 4 - 12 neural fold fuses
11
23 - 26
2.5 - 4.5
Link=Carnegie_stage_11
Somite Number 13 - 20 rostral neuropore closes
12
26 - 30
3 - 5
Link=Carnegie_stage_12
Somite Number 21 - 29 caudal neuropore closes
13
28 - 32
(week 5)
4 - 6
Link=Carnegie_stage_13
Somite Number 30 leg buds, lens placode, pharyngeal arches
Stage 13/14 shown in serial embryo sections series of Embryology Program
14
31 - 35
5 - 7
Link=Carnegie_stage_14
lens pit, optic cup
15
35 - 38
7 - 9
Link=Carnegie_stage_15
lens vesicle, nasal pit, hand plate
16
37 - 42
(week 6)
8 - 11
Link=Carnegie_stage_16
nasal pits moved ventrally, auricular hillocks, foot plate
17
42 - 44
11 - 14
Link=Carnegie_stage_17
finger rays
18
44 - 48
(week 7)
13 - 17
Link=Carnegie_stage_18
ossification commences
19
48 - 51
16 - 18
Link=Carnegie_stage_19
straightening of trunk
20
51 - 53
(week 8)
18 - 22
Link=Carnegie_stage_20
upper limbs longer and bent at elbow
21
53 - 54
22 - 24
Link=Carnegie_stage_21
hands and feet turned inward
Stage 22 shown in serial embryo sections series of Embryology Program
22
54 - 56
23 - 28
Link=Carnegie_stage_22
eyelids, external ears
23
56 - 60
27 - 31
Link=Carnegie_stage_23
rounded head, body and limbs
Following this stage Fetal Development occurs until birth (approx 40 weeks)


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Cite this page: Hill, M.A. (2024, March 29) Embryology Carnegie stage table. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_table

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G