Carnegie stage 9
Introduction
Human embryonic stage 9 occurs during week 3 between 19 to 21 days. The embryo is now 1.5 to 2.5 mm in size and somites have begun to form and number between 1 to 3 somite pairs during this stage.
The first two images using bright field microscopy approximate the orientation of the scanning electron micrographs below. There are additional scanning electron micrographs showing selected features in detail.
--Mark Hill 13:50, 22 August 2009 (EST) Labelled versions of these images will be made available at a later date.
Bright Field View
| Lateral View | Ventrolateral View |
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| Lateral View 1 - Large | Medium | Small | Ventrolateral View 2 - Large | Medium | Small |
Scanning EM View
| Lateral View | Ventrolateral View |
|---|---|
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| Lateral View 1 - Large | Medium | Small | Ventrolateral View 2 - Large | Medium | Small |
Kyoto Collection
| Dorsal View | Ventral View |
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| Embryonic disc, showing the epiblast viewed from the amniotic (dorsal) side. | Embryonic disc, showing the epiblast, connecting stalk and brain fold. |
Image source: UNSW Embryology page Created: 19.03.1999
- 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
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.
Image source: The Kyoto Collection images are reproduced with the permission of Prof. Kohei Shiota and Prof. Shigehito Yamada, Anatomy and Developmental Biology, Kyoto University Graduate School of Medicine, Kyoto, Japan for educational purposes only and cannot be reproduced electronically or in writing without permission.
Cite this page: Hill, M.A. (2024, April 27) Embryology Carnegie stage 9. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_9
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
