Sperm may lose their ability to navigate in microgravity, raising new questions about whether human reproduction is possible in space.

Assisted reproduction can safely help HIV positive men to become fathers without infecting their partners, according to new research from French fertility experts. But, the news is not so good for HIV ...

A University of Michigan-led study based on a review of genetic and health information from more than 276,000 people finds strong support for a decades-old evolutionary theory that sought to explain ...