Skip Navigation
The Endowment for Human Development
The Endowment for Human Development
Improving lifelong health one pregnancy at a time.
Donate Now Get Free Videos

Movie Theater

The Yolk Sac


5 weeks, 2 days

From The Biology of Prenatal Development.Buy Now

Script: O saco vitelino contém as primeiras células reprodutivas, chamadas células germinativas. Dentro de 5 semanas, essas células germinativas migram aos órgãos reprodutivos adjacentes aos rins.

All ages referenced to fertilization, not last menstrual period.
See Snapshots   |   Log in to create a playlist
Transparent Skin
Transparent Skin
Cerebral Hemispheres
Cerebral Hemispheres
The Yolk Sac
The Yolk Sac
The Liver and Heart
The Liver and Heart
Hand Plates and Cartilage
Hand Plates and Cartilage
Brainwaves
Brainwaves
Tell your story. Create your own pregnancy calendar.
Free resources and training for educators


Add a Comment

Your Name: Log In 3rd-party login: Facebook     Google     Yahoo

Comment: