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The Endowment for Human Development
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The Embryonic Period


8 weeks

From The Biology of Prenatal Development.Buy Now

Script: Durante las primeras 8 semanas luego de la concepción, el ser humano en desarrollo se llama embrión, lo cual significa "crece desde dentro". Este período, llamado período embrionario, se caracteriza por la formación de la mayoría de los sistemas corporales.

All ages referenced to fertilization, not last menstrual period.
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Reflexive Movement
Reflexive Movement
Epidermis and Hair
Epidermis and Hair
The Embryonic Period
The Embryonic Period
End of Embryonic Period
End of Embryonic Period
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