Some gut bacteria recycle discarded sex hormones, like oestrogens, back into the body. The level of these bacteria seems to ...

Scientists discovered that making a very small change to female mice's DNA caused them to develop male reproductive organs.

Plants can't move to escape the heat like humans can; they are forced to adapt. As temperatures fluctuate, one key survival ...

The hectocotylus is both a reproductive organ and a sensory organ, a rare combination in animals, new research suggests ...

But what’s the evidence for transgender advantage in sport?

Scientists and physicians agree that there’s been a general decline in male fertility — but they aren’t sure why. Social media buzz has pointed to a few environmental exposures as potential factors, ...

When temperatures rise above 20°C, fewer baby boys are born compared to girls, a new study has found. Researchers at the University of Oxford found that heat exposure can increase prenatal mortality ...

Infertility affects millions worldwide and is increasingly recognized as a major public-health concern. Despite advances in reproductive medicine, the lack of a unified global framework has ...

Mayer is medical research director and co-chair of The Fenway Institute as well as a professor of medicine at Harvard Medical School. Every day, there are 1 million new cases of potentially curable ...

In the United States, almost half of all pregnancies are unplanned, with one report finding that the vast majority of these pregnancies occur due to either lack of, incorrect, or inconsistent use of ...