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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: К 8 тыдню 75% эмбрыёнаў выяўляюць перавагу правай рукі. Астатнія падзяляюцца роўна на тых, хто выяўляе перавагу левай рукі, і тых, хто яшчэ не вызначыўся. Гэта самыя першыя адзнакі, паводле якіх вызначаецца перавага правай ці левай рукі.

All ages referenced to fertilization, not last menstrual period.
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