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The Endowment for Human Development
The Endowment for Human Development
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Right- and Left-Handedness


8 weeks

From The Biology of Prenatal Development.Buy Now

Script: Innen 8 uker, har 75 % av alle embryoer høyrehånds dominans. Resten er likedelt mellom venstrehånds dominans og ingen preferanse. Dette er det tidligste bevis for høyre/venstre atferd.

All ages referenced to fertilization, not last menstrual period.
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Ovaries Identifiable
Ovaries Identifiable
The Highly Complex Brain
The Highly Complex Brain
Right- and Left-Handedness
Right- and Left-Handedness
Rolling Over
Rolling Over
Spontaneous Movement
Spontaneous Movement
Reflexive Movement
Reflexive Movement
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