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The Endowment for Human Development
The Endowment for Human Development
Improving lifelong health one pregnancy at a time.
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Human Zygote

6 hours

Human Zygote [Click for next image]
From The Biology of Prenatal Development.Buy Now

Label Key:

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