In the United States, more than 11% of men under the age of 49 are infertile. While the causes are varied and range from infections to hormonal imbalances, deformities during meiosis—a specialized ...

Unlike women, who are born with all the eggs they'll ever have, men can continue to produce sperm throughout their adult lives. To do so, they require a constant renewal of spermatogonial stem cells, ...

Researchers in Japan have uncovered key information about a protein that plays a crucial role in the process of sperm production, which could unlock doors for male contraception. Scientists from Osaka ...

New research presented at the 42nd Annual Meeting of the European Society of Human Reproduction and Embryology (ESHRE) ...

Why Are Testicles Outside, Anyway? The Chilly Truth Let’s get straight to the facts. There’s a good reason why testicles are ...

Scientists have developed a ­method to temporarily halt the production of sperm cells without damaging surrounding tissues – an advance that could lead to a safe, long-acting and reversible male ...

Scientists have discovered only a handful of genes responsible for stem cell self-renewal, a property that allows stem cells to continue giving rise to a variety of cell types during an organism's ...