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20 gen 2018 anni - Durante los primeros días de su desarrollo, el embrión se nutre de las reservas del óvulo. Pero estas reservas se agotan pronto. Por eso, en el útero, se formaun órgano nuevo para alimentar al embrión: la placenta.
Aggiunto al nastro di tempo:
Embarazo
By
Erick García
8 ott 2018
0
0
349
Data:
20 gen 2018 anni
Adesso
~ 6 years and 4 months ago
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