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The Endowment for Human Development
The Endowment for Human Development
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Spontaneous Movement


8 weeks

From The Biology of Prenatal Development.Buy Now

Script: The embryo is becoming more physically active during this time.

Motions may be slow or rapid, single or repetitive, spontaneous or reflexive.

Head rotation, neck extension, and hand-to-face contact occur more often.

All ages referenced to fertilization, not last menstrual period.
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Right- and Left-Handedness
Right- and Left-Handedness
Rolling Over
Rolling Over
Spontaneous Movement
Spontaneous Movement
Reflexive Movement
Reflexive Movement
Epidermis and Hair
Epidermis and Hair
The Embryonic Period
The Embryonic Period
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