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20 янв 2018 г. - 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.
Добавлено на ленту времени:
Embarazo
By
Erick García
8 окт 2018
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Дата:
20 янв 2018 г.
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~ 6 гг и 4 мес назад
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