A recent Trump executive order defines sex based on gamete size. But the order oversimplifies genetics, hormones and reproductive biology.

A protein that restricts muscle growth also has an unexpected role in the reproductive system, studies 1 in rodents ... researchers inhibited myostatin in male rats, suggesting that the link ...

This review discusses the growing understanding of how cytokines contribute to testicular function and maintenance of male reproductive health, and to the pathologies associated with their abnormal ...