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The Yolk Sac


5 weeks, 2 days

From The Biology of Prenatal Development.Buy Now

Script: 卵黄囊包含 早期生殖细胞， 叫做胚细胞。 到5周， 这些胚细胞移到 肾邻近的 生殖器官。

All ages referenced to fertilization, not last menstrual period.
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Transparent Skin
Transparent Skin
Cerebral Hemispheres
Cerebral Hemispheres
The Yolk Sac
The Yolk Sac
The Liver and Heart
The Liver and Heart
Hand Plates and Cartilage
Hand Plates and Cartilage
Brainwaves
Brainwaves
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