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Rolling Over


 

8 weeks

Buy NowFrom The Biology of Prenatal Development.

Script: Pediatric textbooks describe the ability to "roll over" as appearing 10 to 20 weeks after birth. However, this impressive coordination is displayed much earlier in the low-gravity environment of the fluid-filled amniotic sac. Only the lack of strength required to overcome the higher gravitational force outside the uterus prevents newborns from rolling over.

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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