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Hatching Blastocyst

5 days

Source: Centro Riproduzione Assistita, Catania, Italy.

Note:

The zona has served its purpose and is disintegrating just in time to free the embryo for the next step in the journey.

Label Key:

  • 1. site of escape
  • 2. portion of embryo outside the zona
  • 3. portion of embryo still inside the zona
  • 4. zona pellucida

All ages referenced to fertilization, not last menstrual period.
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Hatching Blastocyst
Hatching Blastocyst
Hatched Blastocyst
Hatched Blastocyst
Hatched Blastocyst
Hatched Blastocyst
Hatched Blastocyst
Hatched Blastocyst
Free Blastocyst  (without zona)
Free Blastocyst (without zona)
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Embryo Cross Section 8-9 Days
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