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Secondary Oocyte
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Source:
Centro Riproduzione Assistita, Catania, Italy
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Label Key:
1. zona pellucida
2. polar body
3. secondary oocyte
4. perivitelline space
All ages referenced to fertilization, not last menstrual period.
Chromosomes and the Nucleus
Sperm
Secondary Oocyte
Single-Cell Embryo
Zygote
Human Zygote
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