Sex cells made from scratch could revolutionize human reproduction. But researchers are struggling to translate promising ...

New work from UC Davis and the University of Utah shows how the 3D structure of DNA inside a germ cell commits it to develop into a sperm cell. The discovery could improve understanding of fertility ...

Genetic changes that create ever-expanding numbers of identical sperm cells are more widespread than previously thought, ...

CHICAGO (Reuters) - U.S. researchers have found a way to coax human embryonic stem cells to turn into the types of cells that make eggs and sperm, shedding light on a stage of early human development ...

Harmful genetic changes in sperm become substantially more common as men age because some are actively favored during sperm ...

"For the first time, scientists have shown that DNA from ordinary body cells can be placed into an egg, activated, and made to halve its chromosomes, mimicking the special steps that normally create ...

WASHINGTON (Reuters) - Stem cells that normally make sperm can be taught to make other tissues as well, perhaps offering men a medical repair kit, U.S. researchers said on Wednesday. Sign up here.

Scientists said Tuesday they have turned human skin cells into eggs and fertilized them with sperm in the lab for the first time—a breakthrough that is hoped to one day let infertile people have ...

As men age, harmful sperm mutations increase — not just by chance, but because some are favored during sperm production.

A new study suggests that a father’s COVID-19 infection could do more than make him sick – it may leave marks on his sperm ...