Female mammals—including humans—are born with all of their egg cells. Of a woman's one to two million egg cells, about 400 ...

The first mice to be created from two fathers, a phenomenon known as androgenesis, have now produced healthy offspring for ...

The immature egg cells form inside a female’s body when she’s still a fetus in her mother’s womb, and then they wait in a quiescent state for years, if not decades. Cocooned inside ovaries, they pause ...

New companies are working to commercialize in vitro gametogenesis, or IVG, a technology that could make human eggs and sperm in the lab from any cell in the body.

Human eggs are designed to hold out for a long haul. When a person is born with a female reproductive system, they’ve already developed all the eggs they’ll have for the rest of their life.

Mice who were created by scientists using the genetics of two biological fathers have gone on to have their own offspring ...

The team, led by Katsuhiko Hayashi, a professor of genome biology at Osaka University in Japan, generated eggs from the skin cells of male mice that, when implanted in female mice, went on to ...