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The Human Morula
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3 days
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From
The Biology of Prenatal Development
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Note:
The morula stage is reached when about 12 to 16 cells are present. This morula may contain 30 cells or more.
Label Key:
1. perivitelline space
2. zona pellucida
All ages referenced to fertilization, not last menstrual period.
Ten-Cell Embryo
Morula: Twelve-Cell Embryo
The Human Morula
Early Blastocyst
Blastocyst
Blastocyst with Inner Cell Mass
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