Video of a new mathematical model that predicts that mammalian sperm cells have two distinct swimming modes. This prediction opens new questions about potential connections between sperm cells’ motor ...

In the United States, an estimated 645,000 men ages 20 to 50 have azoospermia, a condition in which no sperm are present in their ejaculate. Now, scientists are testing a potential treatment: ...

Scientists have decoded a protein from sea-urchin sperm that's also found in other animals, including humans, raising a new potential avenue for treating male infertility and developing male birth ...