Most research on testosterone has focused on heterosexual couples. New research looks at the hormone's role in pregnancy in lesbian couples.

Researchers have determined the 3D structure of the receptor that the hormone oxytocin binds to. The findings could aid drug development.

Evidence that fat-burning neurons can grow in response to leptin suggests a potential way to promote weight loss, say researchers.

A broad look at research on endocrine disruptors and human health consequences suggests regulations need to catch up to the evidence.

Wild dolphins are fast, smart and hard to study, but it is important to understand how human actions affect their health. So we are building a drone to sample hormones from the blowholes of dolphins.

"Pregnancy is such an everyday event—none of us would be here without it—and yet, so many aspects of this process remain puzzling."

Why does COVID-19 affect men more than women? It could be related to the hormones that cause hair loss in men, a new hypothesis suggests.

Polycystic ovary syndrome (PCOS) "...affects women in a number of ways throughout their life course. It is not just about ovaries."

Stress hormones in the blood have a big influence on the brain's circadian rhythm, according to research in rats.

New research investigates how testosterone affects moral reasoning. The findings suggest a complicated relationship.