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The Endowment for Human Development
The Endowment for Human Development
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Ten-Cell Embryo

58 hours

Source: Centro Riproduzione Assistita, Catania, Italy.

Note:

The overall size of the embryo continues to be about the same as the one-cell embryo.

Label Key:

1. zona pellucida
2. perivitelline space
All ages referenced to fertilization, not last menstrual period.
Eight-Cell Embryo
Eight-Cell Embryo
Nine-Cell Embryo
Nine-Cell Embryo
Ten-Cell Embryo
Ten-Cell Embryo
Morula: Twelve-Cell Embryo
Morula: Twelve-Cell Embryo
The Human Morula
The Human Morula
Early Blastocyst
Early Blastocyst


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