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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: در مدّت 8 هفته، 75 در صد جنین ھا تسلط دست راست را ارائه می دھند. باقیمانده بطور مساوی درمیان چپ دستان و بدون ترجیح قسمت می گردد. اینک زودهنگام ترین نشانه رقتار راست یا چپ دست بودن می باشد.

All ages referenced to fertilization, not last menstrual period.
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