File:Stage9 sem4c.jpg

Human Embryo Carnegie Stage 9

Stage 9 day 20, somites 3-4 (scale bar 100 μm)

Dorsal view (amniotic sac cut away) showing the embryo and cut amnion edge.

Note:

1. the shape of the early folded embryonic disc and rostro-caudal bendings.
2. the neural groove and brain fold.
3. the earliest forming somites.
4. the connecting stalk.

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

Template:Carnegie stages table1 Image Source: Scanning electron micrographs of the Carnegie stages of the early human embryos are reproduced with the permission of Prof Kathy Sulik, from embryos collected by Dr. Vekemans and Tania Attié-Bitach. Images are for educational purposes only and cannot be reproduced electronically or in writing without permission.

Embryonic Development