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The Endowment for Human Development
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Hatched Blastocyst

#55, Slide 34 of 312

5 days

Source: Centro Riproduzione Assistita, Catania, Italy.

Note:

With the escape from the zona complete, the embryo is free to implant.

Label Key:

1. embryo at the blastocyst stage
2. shell of discarded zona pellucida
All ages referenced to fertilization, not last menstrual period.
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