WebMay 6, 2008 · New research explains how three proteins conspire to determine an embryo's sex. In research that could give doctors a way to reassign sex in cases of unclear gender, scientists report this week ... WebJul 31, 2015 · Boys and girls are different. It seems so obvious. Yet some medical conditions may cause some of those differences to become confused. And then telling apart boys from girls can prove challenging. It’s one measure of how complex human biology is. When it comes to whether someone looks like a boy or girl, hormones clearly run the …
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