Humans don’t have a defined mating season like deer or wolves. Here’s how evolution blended biology, culture and social life into year-round intimacy.

One of the most popular explanations for why menopause evolved in some species is called the grandmother hypothesis. Essentially, older females stop having offspring of their own, and redirect energy ...

Researchers should urgently think about how humans can reproduce in space, experts have said. As humanity looks towards living beyond Earth, we need to understand how human reproduction will actually ...

Biological sex is all over the news lately. Between the presidential executive order affecting passport policy, moving transgender inmates between prisons and regulating women's sports, appeals to ...

Off a quiet hallway on the top floor of a building at the University of Osaka in Japan, Katsuhiko Hayashi is hatching a revolution. Human embryo science: can the world’s regulators keep pace? He is on ...