File:Stage2 bf01.jpg
Stage2_bf01.jpg (650 × 521 pixels, file size: 49 KB, MIME type: image/jpeg)
Human Embryo Carnegie Stage 2
Carnegie Collection Embryo No.8698
Facts: Week 1, 4 - 5 days, size 0.1-0.2 mm
2 cells, Carnegie No. 8698. Described by Hertig etal. (1954). Tubal. Diameter, 178.5 um (122 x 88 after fixation; 111.6 X 75 after sectioning); blastomeres, 71 (74 x 64 and 80 x 56 after fixation; 68.3 x 61.6 and 70 x 50 after sectioning); polar bodies, 20 x 18 after fixation. A few cells of the corona radiata were present. Thick zona pellucida (18um in thickness before fixation). No spermatozoa were seen in the zona, and the possibility of parthenogenetic cleavage "cannot be entirely ruled out" (Dickmann etal, 1965). Two polar bodies. Whether the larger blastomere "is the one of trophoblastic potential is unknown but it is probable" (Hertig, 1968). Believed to be about I-2 days old.
Features: zona pellucida, trophoblast shell, inner cell mass, blastoceol
- Carnegie Stages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | About Stages | Timeline
Cite this page: Hill, M.A. (2024, June 20) Embryology Stage2 bf01.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Stage2_bf01.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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| Gwalagizhi | Nyangagi | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:49, 7 March 2012 | | 650 × 521 (49 KB) | Z8600021 (talk | contribs) | ==Human Embryo Carnegie Stage 2== Carnegie Collection Embryo No.8698 '''Facts:''' Week 1, 4 - 5 days, size 0.1-0.2 mm 2 cells, Carnegie No. 8698. Described by Hertig etal. (1954). Tubal. Diameter, 178.5 um (122 x 88 after fixation; 111.6 X 75 after sec |
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