Physically, We All Began As Female

We were all female

None

Key Facts In This Video

  1. Physically speaking, all humans were once "female" in the womb—though some prefer to say we were gender neutral. 00:02

  2. The first 5–6 weeks of embryonic development involve only the X chromosome, not the Y chromosome. 00:32

  3. Nipples form before the activation of the Y chromosome in embryonic development. 01:28

Written by Curiosity Staff December 30, 2014

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