Talk:Hill Family/@comment-5932670-20130113084112/@comment-5932670-20131228223055

And oh, they are two chromosones, X and Y, ones with 2 X chromosones develop ovaries and become female, and ones with only one X and one Y develop testes instead of ovaries and become male, so it is impossible for men to get pregnant, unless the switched their gender or transgender, which are the only two ways, but are very, very rare.