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The Endowment for Human Development
The Endowment for Human Development
Improving lifelong health one pregnancy at a time.
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Hatched Blastocyst

6 days

Hatched Blastocyst [Click for next image]
Source: Centro Riproduzione Assistita, Catania, Italy.

Note:

Can you see the defect in the zona through which the embryo escaped?

Label Key:

1. shell of zona
2. free embryo at blastocyst stage
3. inner cell mass
All ages referenced to fertilization, not last menstrual period.
Hatched Blastocyst
Hatched Blastocyst
Hatched Blastocyst
Hatched Blastocyst
Hatched Blastocyst
Hatched Blastocyst
Free Blastocyst (without zona)
Free Blastocyst (without zona)
Embryo Cross Section 8-9 Days
Embryo Cross Section 8-9 Days
Embryo at About 11 Days
Embryo at About 11 Days
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