Genes associated with male reproductive biology appear to be under relaxed selective constraint in a primate species with low sperm competition.

The number of practitioners has dramatically risen in Britain, but it's no longer as lucrative a field as you might expect ...

Alfred Kinsey grew up in a world where sex education, such as it was, focused on abstention. Masturbation was held to be sinful, a sickness with the power to erode one's physical health and moral ...

Successful reproduction presents a fundamental evolutionary paradox: the immune system must tolerate genetically foreign sperm and embryos while maintaining ...

Female fertility depends on the successful growth and maturation of eggs (oocytes) within ovarian follicles. Within these ...

Customers should stop using the product immediately.

Female mammals have long thought to be born with all the eggs they would ever have, but new research is challenging that consensus ...

A 35-year-old woman mayor of Yawata, Japan, announced she would take the government provided 16-week maternity leave. A lot ...