Image GalleryBlastocyst with Inner Cell Mass |
![Blastocyst with Inner Cell Mass [Click for next image]](http://media.ehd.org/images/prenatal_numbered_491/blastocyst-with-inner-cell-mass.jpg "Click for next image")
 From The Biology of Prenatal Development. |
Note:The inner cell mass is made up of embryonic stem cells.Label Key:
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| All ages referenced to fertilization, not last menstrual period. |
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Blastocyst with Inner Cell Mass
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Hatching Blastocyst
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Hatching Blastocyst
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Hatched Blastocyst
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Hatched Blastocyst
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Hatched Blastocyst
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