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

Slideshow: Early Events

Ten-Cell Embryo

#49, Slide 12 of 24

58 hours

Source: Centro Riproduzione Assistita, Catania, Italy.

Note:

The overall size of the embryo continues to be about the same as the one-cell embryo.

Label Key:

1. zona pellucida
2. perivitelline space
All ages referenced to fertilization, not last menstrual period.
Buy the Biology of Prenatal Development DVD
Tell your story. Create your own pregnancy calendar.