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The Folding of the Embryo

3 weeks, 3 days

From The Biology of Prenatal Development.Buy Now

Note:

My heart began beating about 22 days after fertilization—and just in the nick of time!

Note:

My brain and spinal cord are growing faster than everything else and my shape is curving more each day.

Label Key:

  • 1. heart
  • 2. digestive tract
  • 3. location of future mouth opening

All ages referenced to fertilization, not last menstrual period.
Hide Labels | Larger | Play Movie #11
The Folding of the Embryo
The Folding of the Embryo
( 3 weeks, 3 days)
Heart Chambers and Liver
Heart Chambers and Liver
( 4 weeks, 4 days)
Heart in Slow Motion
Heart in Slow Motion
( 4 weeks, 4 days)
The Early Brain and Face
The Early Brain and Face
( 4 weeks, 6 days)
Amnion
Amnion
( 4 weeks, 6 days)
Heart and Liver
Heart and Liver
( 4 weeks, 6 days)
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