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

Image Gallery

Zygote

6 hours

From The Biology of Prenatal Development.Buy Now

Label Key:

1. zona pellucida
2. cell membrane
3. perivitelline space
4. artifact
5. cytoplasm
All ages referenced to fertilization, not last menstrual period.
Secondary Oocyte
Secondary Oocyte
Single-Cell Embryo
Single-Cell Embryo
Zygote
Zygote
Human Zygote
Human Zygote
The Zygote
The Zygote
Two-Cell Human Embryo
Two-Cell Human Embryo


Add a Comment

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

Comment: