It’s not just about chromosomes. Or reproductive cells. Or any other binary metric. Many genetic, environmental and developmental variations can produce what are thought of as masculine and feminine ...

Semen is a fluid that carries sperm, or male reproductive cells, out of the body during ejaculation. The average amount of ...

The male reproductive tract is a specialized environment that is inhabited by a diverse microbiota. Semen, which contains secretions from multiple glands and the testes, serves as a convergence point ...

New research has mapped the cell types that specialise to form reproductive organs in both sexes, identifying key genes and signals that drive this process. The findings offer important insights into ...

But they've done a lot more than that. The impact of sex as a biological variable is far more subtle and pervasive than it may seem. In fact, sex-based differences with implications for our health ...

A January executive order by President Donald Trump designates people as female if they make the “large” reproductive cell (the egg) and male if they make the “small” one (the sperm). But the human ...

Michigan State University scientists are aiming to make the male fertility process easier by promoting non-hormonal based treatment. The difficulty is the sperm requiring sudden demand for energy ...

Chemotherapy may lead to temporary or permanent male infertility. Chemotherapy is a potent cancer treatment that involves drugs that target and destroy rapidly dividing cancer cells. Although it is ...