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The Endowment for Human Development
The Endowment for Human Development
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The Zygote

#402, Slide 15 of 312

6 hours

From The Biology of Prenatal Development.Buy Now

Label Key:

1. polar body
2. perivitelline space or subzonal space
3. zona pellucida
4. cell membrane
5. artifact
All ages referenced to fertilization, not last menstrual period.
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