Skip Navigation
The Endowment for Human Development
The Endowment for Human Development
Improving lifelong health one pregnancy at a time.
  • English
Español
Português
Educator Login / Register
Donate Now Get Free Videos

Slideshow: Entire Image Gallery by EHD

3-Week Embryo

#31, Slide 50 of 312

3 weeks

From The Biology of Prenatal Development.Buy Now

Label Key:

1. amnion
2. amniotic cavity
3. umbilical cord
4. allantois
5. yolk sac
All ages referenced to fertilization, not last menstrual period.
Help give babies a healthy start and a healthy future. Donate now.
Buy the Biology of Prenatal Development DVD