Gender

3/16/16 If someone says that one in 1,000 babies are born with something other than standard gender characteristics, they might be right (or the number might be higher because of under-reporting and definition agreement).

I knew it happened, but thought it was extremely rare.

Sources:
http://www.isna.org/faq/frequency

http://www.who.int/genomics/gender/en/index1.html

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