Male pregnancy is a rare phenomenon in the animal kingdom, with just three vertebrates exhibiting this behavior. The seahorse ...

A trans man discovered he was five-months pregnant at a very late stage in ... but will legally register as its father, making Marco a "seahorse dad." The term denotes trans men who carry babies ...

And I wanted to be outdoors. Then I had an academic interest in the evolution of sex differences—and in seahorses only the male gets pregnant, which of course raises a lot of questions about sex ...