This Embryology category shows some key events of human development during Week 1 of the embryonic period of the first eight weeks (weeks 1 - 8) following fertilization. This period is also considered the organogenic period, when most organs within the embryo have begun to form. There are links to more detailed descriptions which can be viewed in a week by week format, by the historic Carnegie stages or integrated into a Timeline of human development.
Online resources available include: individual images of all Carnegie stages, scanning electron micrographs of the earlier stages, cross-sections showing internal structures at mid- and late-embryonic, 3D reconstructions of internal structures, animations of processes, ultrasound scans and information about abnormalites of development.
Note that there is variability in the actual timing of specific events and at the end of this period fetal development begins.
|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|
This category has the following 12 subcategories, out of 12 total.
Pages in category ‘Week 1’
The following 63 pages are in this category, out of 63 total.
- Carnegie stage 1
- Template:Carnegie stage 1 links
- Carnegie stage 2
- Template:Carnegie stage 2 links
- Carnegie stage 3
- Template:Carnegie stage 3 links
- Carnegie stage 4
- Template:Carnegie stage table week 1
Media in category ‘Week 1’
The following 68 files are in this category, out of 68 total.
- Blastomere isolation.jpg 95 KB
- CSt3.jpg 20 KB
- Early zygote.jpg 23 KB
- Human blastocyst day 3-6.mov 4.26 MB
- Human blastocyst day 5-6.mov 979 KB
- Human embryo day 2.jpg 19 KB
- Human embryo day 5 label.gif 243 KB
- Human-oocyte.jpg 29 KB
- Mouse E0-E5.jpg 90 KB
- Pronuclear fusion 001.mov 115 KB
- Stage2 bf01.jpg 49 KB
- Stage2.jpg 4 KB
- Stage3 bf01.jpg 39 KB
- Stage3 bf02.jpg 31 KB
- Week 1 cartoon.jpg 37 KB
- Week1 summary.jpg 107 KB