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9 results
Ein neues Menschenleben entsteht durch die Verschmelzung von Spermium und Eizelle. Dieses Video zeigt den ...
225,392 views
5 years ago
Did you know that about a third of a baby's brain growth occurs in the last 6 weeks of pregnancy? Preterm birth is the delivery of a ...
160,048 views
6 years ago