Humans living in space for months, years, or even generations will need to navigate sex in a zero-gravity world.

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

While space agencies are making significant preparations for long-term missions to the Moon and Mars, a fundamental human ...

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

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 ...

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

While humans often struggle to find a partner who is both physically attractive and a reliable co-parent, yeast may already have cracked the formula for the perfect match. When choosing mates, these ...

Ducks with corkscrew penises, fish changing sex – what do we really know about sex and reproduction on Earth? Less than we ...

In the quest to create better options for couples facing infertility, scientists have been racing to create eggs and sperm in a laboratory dish. A study published Tuesday in Nature Communications from ...