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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: A les 8 setmanes, el 75% dels embrions mostren un domini a favor de la mà dreta. La resta està igualment dividida entre el domini de la mà esquerra i cap preferència. Aquesta és la manifestació més inicial del comportament de ser destre o esquerrà.

All ages referenced to fertilization, not last menstrual period.
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