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 ...

COVID-19 infection may meaningfully affect male reproductive health, while having limited consequences for female fertility or assisted reproductive technology (ART) outcomes, according to a new ...

The cellular biology of reproduction is often depicted as an epic journey, in which millions of intrepid sperm fight to be the first to claim the ultimate prize: the chance to fertilize the egg, which ...