Unlike women, who are born with most of the eggs they’ll ever have, men produce sperm continuously from puberty onward, storing it in the reproductive tract until it’s ready for release. When men need ...

What does it mean when a snow leopard, important to species survival, is deemed effectively sterile? That was the topic of conversation at the Louisville Zoo last week after a reproductive assessment ...

It’s just like coach used to say: practice makes perfect. Recent research suggests that regular masturbation and/or sex can ...

What does it mean when a snow leopard, important to species survival, is deemed effectively sterile? That was the topic of ...

From supplements to testicle ice baths, anxieties about infertility are pushing men to great lengths to preserve their sperm.

Having a baby in space may require a bit more direction, with new Adelaide University research revealing the navigational ...

Two new studies from Project CETI provide the most detailed account of a sperm whale birth ever recorded, revealing ...

Having a baby in space may require a bit more direction, with new Adelaide University research revealing the navigational ...

Having a baby in space may be far more complicated than expected, as new research shows sperm struggle to find their way in microgravity.

Wastewater runoff in Hampton Roads carries hidden pollutants into local waterways, impacting fish, public health, and the ...

Identifying the sex of a reptile cen be difficult on appearance alone, but there are some ways to distinguish. Read here to ...

Spotted hyena clans flip the script on mammalian power: here, dominance is inherited, alliances matter most and females rule ...