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Day 1: fertilization: all human chromosomes are present; unique human life begins. Day 6: embryo begins implantation in the uterus. Day 22: heart begins to beat with the child's own blood,... | more...

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Channels: Scientific Animations Medical

Tags: fertilization

Upload by: watchme on 23-11-2007.

Duration: 3m 2s

Dnatube: Sciencific and Medical video site.