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Who actually determines the baby's gender? 👶🧬 #ScienceFacts #Pregnancy

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972 views7likes24EverythingExplainedByTheProOriginal Release: 2026-06-11

In human reproduction, the father determines the baby's biological sex because women always contribute an X chromosome while men contribute either an X or Y chromosome; if an X-bearing sperm fertilizes the egg, the baby will be female (XX), and if a Y-bearing sperm fertilizes the egg, the baby will be male (XY).

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