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The Endowment for Human Development
The Endowment for Human Development
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4 weeks, 6 days

From The Biology of Prenatal Development.Buy Now

Script: 这时皮肤透明, 因为它只有一个细胞的厚度。

随著皮肤变厚, 这种透明性失去, 这意味著我们还有 一个月的时间 可以观看内部器官发育。

All ages referenced to fertilization, not last menstrual period.
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The Heart in Action
The Heart in Action
The Limbs Bud
The Limbs Bud
Transparent Skin
Transparent Skin
Cerebral Hemispheres
Cerebral Hemispheres
The Yolk Sac
The Yolk Sac
The Liver and Heart
The Liver and Heart
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