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The Endowment for Human Development
The Endowment for Human Development
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Reflexive Movement


8 weeks

From The Biology of Prenatal Development.Buy Now

Script: Touching the embryo elicits squinting, jaw movement, grasping motions, and toe pointing.

All ages referenced to fertilization, not last menstrual period.
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Rolling Over
Rolling Over
Spontaneous Movement
Spontaneous Movement
Reflexive Movement
Reflexive Movement
Epidermis and Hair
Epidermis and Hair
The Embryonic Period
The Embryonic Period
End of Embryonic Period
End of Embryonic Period
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