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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: Huit semaines marquent la fin de la période embryonnaire.

Jusqu'ici, l'embryon humain s'est développé à partir d'une seule cellule pour atteindre presque le milliard de cellules qui forment plus de 4 000 structures anatomiques distinctes.

L'embryon possède maintenant plus de 90 % des structures présentes chez l'adulte.

All ages referenced to fertilization, not last menstrual period.
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