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.

A new study by NASA scientists explores the risks and challenges of human reproduction in space, especially for long missions ...

Floating in near-weightless conditions can be disorienting for even the most experienced astronauts. Male reproductive ...

On Earth human sperm tend to know where to go when it comes to fertilizing an egg in utero. But that may not be the case in ...

As humankind moves toward the goal of establishing a long-term presence on the moon and Mars, the question of whether ...

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

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

For a long time, having children has been a young person’s game. Although ancient records are sparse, researchers estimate that, for most of human history, women most typically conceived their first ...

You'd think we'd know everything there is to know about sexual reproduction. But as it turns out, there are still quite a few things we picked up that aren't exactly true, and we're here to correct ...