Reporting in Science, researchers write that mouse stem cells can be transformed not only into egg cells--but into newborn pups. Sean Morrison, a stem cell expert at the University of Texas ...

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 ...

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.

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 ...

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 ...

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.

The ready-made reproductive support cells, Fertilo, can mature eggs in a petri dish rather than inside a human body. In most parts of the world, ...

Demand for egg freezing has skyrocketed as women put fertility on hold. The costly procedure has brought happy endings to some women, but it doesn't offer any guarantees.