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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: 8 週までには 胎芽の75% が 右利きの優勢を表します 残りの25% は 左利きの優勢と どちらでもない 場合とに均等に分かれます これが 右利き左利き行動の 最初の証拠です

All ages referenced to fertilization, not last menstrual period.
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