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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: Eo amin'ny herinandro 8 , amin'ny 75%-ny embryons rehetra dia hita fa ny ankavanana no manjaka. Ny sisa dia mizara mitovy na kavia na tsy mifidy. Io ny ahitana voalohany ny fihetsika avy eo amin'ny ankavia na ankavanana.

All ages referenced to fertilization, not last menstrual period.
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