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The Endowment for Human Development
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End of Embryonic Period


8 weeks

From The Biology of Prenatal Development.Buy Now

Script: 8 uker markerer slutten til embryonalperioden.

I løpet av denne tiden, har embryoet vokst fra å være en enkelcelle til å bli nærmest 1 milliard celler som former mer enn 4,000 distinkte anatomiske strukturer.

Embryoet består nå av mer enn 90 % av de strukturer som finnes hos voksne mennesker.

All ages referenced to fertilization, not last menstrual period.
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