Girl Sperm

Did You Know?

In the middle ages, people believed that sperm coming from the left testicle produced girls. Men who wanted sons had it removed sometimes.

As early as 330 BC, Aristotle prescribed the ligation (tying off) of the left testicle in men wishing to have boys. In the Middle Ages, men who wanted a boy sometimes had their left testicle removed. This was because people believed that the right testicle made "boy" sperm and the left made "girl" sperm.

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