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Morula: Twelve-Cell Embryo

60 hours


Note:

This 12-cell embryo is now at the earliest stage at which the embryo can be called a "morula," which is the scientific word used to describe a ball of cells. This term will continue to apply until a cavity begins to form inside this spherically shaped clump of cells. The age is approximate.

Label Key:

  • 1. zona pellucida
  • 2. perivitelline space
Source: Centro Riproduzione Assistita, Catania, Italy. All ages referenced to fertilization, not last menstrual period.
Morula: Twelve-Cell Embryo
Morula: Twelve-Cell Embryo
The Human Morula
The Human Morula
Early Blastocyst
Early Blastocyst
Blastocyst
Blastocyst
Blastocyst with Inner Cell Mass
Blastocyst with Inner Cell Mass
Hatching Blastocyst
Hatching Blastocyst
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