See why the ovary − often reduced to its reproductive role − menopause, age and estrogen affect a woman’s health throughout ...

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 ...

You don't need any gadgets to gauge the freshness of an egg. This one simple trick is enough, though you can use some more ...

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

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.

Males imprint their DNA by adding methyl modifications to it in a way that alters the activity of genes in order to promote ...

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 ...

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.

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 ...

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.

Scientists have created mice with two biologically male parents for the first time — a significant milestone in reproductive biology.