Molecular mechanism uncovered in mice by UC Santa Cruz researchers reveals how a father’s diet, stress, and other ...

Researchers at Newcastle University in England report they have coaxed the first human sperm cells from embryonic stem cells, in a remarkable demonstration of how quickly the field of stem-cell ...

With the help of the ESRF, researchers from Karolinska Institutet (Sweden) have discovered the reproductive mechanism that permanently blocks polyspermy — a pathologic condition that arises when more ...

A Yale-led research team has uncovered how a naturally occurring biological mechanism found in mammals is able to prevent sperm cells from interacting with an egg, preventing fertilization. The ...

Call them sperm on steroids, these 6-inch (15 cm) long wriggly organisms that Australian fertility specialists have magnified more than 7000x to help determine which are most likely to fertilize that ...

Pregnancy is often talked about as though it’s a light switch. You’re a regular person walking around and then a switch flips — presto, you’re pregnant. The reality is more nuanced. "Sex ed really ...

How a sperm and an egg fuse together has long been a mystery. New research by scientists in Austria provides tantalizing clues, showing fertilization works like a lock and key across the animal ...