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The Endowment for Human Development
The Endowment for Human Development
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Responds to Sound


5 months

From The Biology of Prenatal Development.Buy Now

Script: 5個月

到20週，在完全 發育的內耳裏， 聽覺器官耳蝸 已經達到成年人 的尺寸。 從現在開始， 胎兒對各種 聲音作出反應。

All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.
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