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Q&A Explanation to period in a sterile society

The world I'm building relies on the fact that the whole population is sterile, and all babies are conceived in vitro. They do not have bellybuttons anymore but they still have genitals, and do not...

5 answers  ·  posted 6y ago by Lyzvaleska‭  ·  last activity 6y ago by Lyzvaleska‭

Question biology humans