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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: 8주까지는 배아들의 75%가 오른손 우위를 보인다 나머지는 왼손 우위와 우위 없음으로 똑같이 나누어진다 이것이 가장 초기의 오른손 또는 왼손 습성의 징후이다

All ages referenced to fertilization, not last menstrual period.
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