The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond ...

In the animal kingdom, pregnancy is usually the role of the female, but a few unique species have flipped this biological norm. Male pregnancy evolved in these species to increase reproductive success ...

“My assigned sex at birth was a commodity that was bought and paid for. So when I was feminine as a child and then turned out to be transgender, I was going against the product that was sold,” Wilson, ...