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The Endowment for Human Development
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Hatched Blastocyst

6 days

Source: Centro Riproduzione Assistita, Catania, Italy.

Note:

It's hard to believe but this big embryo once fit in that small shell.

Label Key:

1. embryo at the blastocyst stage
2. empty zona pellucida
All ages referenced to fertilization, not last menstrual period.
Hatching Blastocyst
Hatching Blastocyst
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
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