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Ready for Birth and Beyond

Note:

Only one male cell is allowed to enter the oocyte. When the male and female DNA merge, a new embryo is born!

Label Key:

  • 1. female reproductive cell (oocyte), sometimes called an "egg"
  • 2. male reproductive cells (spermatozoa), sometimes called "sperm"
All ages referenced to fertilization, not last menstrual period.
Ready for Birth and Beyond
Ready for Birth and Beyond
( 9 months)
On my way: One cell becomes two
On my way: One cell becomes two
( 36 hours)
The Human Morula
The Human Morula
( 3 days)
Blastocyst with Inner Cell Mass
Blastocyst with Inner Cell Mass
( 5 days)
Embryo at About 11 Days
Embryo at About 11 Days
( 11 days)
Germ Layers of the Embryo
Germ Layers of the Embryo
( 14 days)
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