Men with low testosterone have a higher risk of hospitalization due to COVID, research finds. Hormone replacement therapy may shield them from severe disease.

Some extra testosterone promotes cuddling and unusual friendliness in male Mongolian gerbils, report researchers.

Researchers have found a link between low testosterone and more severe COVID-19. It could explain why men seem to get worse cases.

Interviews with trans men undergoing testosterone therapy reveal that the voice is one of the most profound and important physical changes they experience.

Interviews with trans men undergoing testosterone therapy reveal that the voice is one of the most profound and important physical changes they experience.

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

Researchers have identified a stress-activated depression circuit that drives different behavior in male and female mice.

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