As a quartet of astronauts make their way to the far side of the Moon, far-fetched notions of human colonies on the satellite or even Mars - a three-year return trip - are again getting an airing.

New study finds microgravity disrupts sperm and embryo development, raising concerns about human reproduction in space.

A new study suggests humans face barriers to reproducing in space, with microgravity disrupting sperm movement.

Floating in near-weightless conditions can be disorienting for even the most experienced astronauts. Male reproductive cells—sperm—also seem to get confused in simulated microgravity, which has ...

A new study found that microgravity simulated on Earth hindered sperm cell movement, egg fertilization and embryo development ...

Sperm may lose their ability to navigate in microgravity, raising new questions about whether human reproduction is possible ...