Utah startup says it grew human sperm in lab, creating embryos in early test of infertility breakthrough.

Paterna Biosciences says it has determined the set of instructions needed to turn sperm-making stem cells into "normal, ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. While men may be able to have children much later than women, doing so could come with an increased risk of inherited ...

Seasonal shifts in behavior — not temperature — may subtly influence sperm motility. Whether this variation in sperm quality ...