Female hyenas have 3 times more testosterone than males, which leads to a strange and dangerous labor procedure. Female hyenas deliver through their clitoris, likewise called a pseudo-penis. The birth canal of a hyena is just about one inch throughout, and as a result, numerous hyena infants do not make it through. Suffocation is a regular event for the cubs, as is the death of novice hyena moms.

Other animals have a pseudo-penises, too, such as squirrel monkeys, lemurs, fossas, a cat-like meat-eating mammal, and binturongs, mammals with a face like a feline’s and a body like a bear’s.