Microplastics have been found in human semen and testes, but do they cause infertility? Explore the latest evidence on sperm ...

Despite their formidable bodies, male gorillas are lacking in one particular area of their anatomy. They have the smallest penises and testes of all apes, and produce a low amount of sperm that ...

Clinical data reveals male factors contribute to half of all infertility cases, shifting the focus toward earlier ...

Male fertility rates have been plummeting over the past half-century. An analysis from 1992 noted a steady decrease in sperm counts and quality since the 1940s. A more recent study found that male ...

This short film introduces the topic of reproduction and that babies start from an egg and sperm. This series of short films ...

New research presented at the 41st Annual Meeting of the European Society of Human Reproduction and Embryology (ESHRE) reveals the presence of microplastics in human reproductive fluids, raising ...

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 ...