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Blastocyst with Inner Cell Mass

5 days
From The Biology of Prenatal Development.Buy Now

Note:

I am finally getting bigger. Not only that, doctors can already tell where my back and chest will grow.

Label Key:

  • 1. protective layer
  • 2. future surface of chest and belly
  • 3. future surface of back

All ages referenced to fertilization, not last menstrual period.
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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)
Tube-Shaped Heart
Tube-Shaped Heart
( 3 weeks)
Three-Week Embryo
Three-Week Embryo
( 3 weeks)
The Folding of the Embryo
The Folding of the Embryo
( 3 weeks, 3 days)
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