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The Endowment for Human Development
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Amniotic Fluid


4 weeks, 4 days

From The Biology of Prenatal Development.Buy Now

Script: 到4週, 在裝滿液體的囊裏, 清澈的羊膜包圍胚胎。 這種無菌的液體 叫做羊水, 它保護胚胎 不受傷害。

All ages referenced to fertilization, not last menstrual period.
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Sections of the Brain
Sections of the Brain
Body Cavity Formation
Body Cavity Formation
Amniotic Fluid
Amniotic Fluid
The Heart in Action
The Heart in Action
The Limbs Bud
The Limbs Bud
Transparent Skin
Transparent Skin
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