Scientists are making inroads in understanding one of the central mysteries of human reproduction: Why do women’s eggs deteriorate as they age?

The findings shed new light on human reproduction and suggest pathways for developing treatments to lower the risk of ...

Men assess potential rivals that have a larger penis as more of a threat, both physically and sexually, according to a study by Upama Aich at the University of Western Australia and colleagues, ...

Men assess potential rivals that have a larger penis as more of a threat, both physically and sexually, according to a study ...

A new study suggests humans belong in an elite “league of monogamy,” ranking closer to beavers and meerkats than to ...

Men are reportedly ditching their polyester underwear in favor of cotton and natural fibers due to fertility and microplastic ...

Once mosquitoes acquire a new food source, they tend to develop a preference for that particular blood—and humans are one ...

Australian researchers found that human penis size influences both female attraction and male assessment of rivals.

Deforestation has reduced the plants and animals on which mosquitoes feed.