Not all fish play by the same reproductive rules. Evolutionary biology reveals how deception became a successful mating ...

In this population-level cohort study of 20 low-mortality countries, females ages 35 to 60 experienced disadvantage in cancer mortality compared with males—a consistent pattern observed across birth ...

A new study on mayflies of the genus Ecdyonurus illustrates just how multifaceted and surprising reproductive behavior in ...

Female fertility depends on several factors including menstrual cycles, ovulation, age, and lifestyle. Experts explain the ...

Researchers found a rare, strictly binary brain feature in mice that is permanently active in females but completely dormant ...

Men have nipples, mammary glands and the hormones required, but the ability for male lactation rarely turns on. Here’s why ...

Thirty babies in a lifetime might sound unbelievable, but in the animal world, that number can be modest. Reproduction follows a clear biological pattern.

The experiment began with a straightforward prediction: microbes from older mice would age young ovaries. But when the ...

Amazon mollies don't need a man, and never will. A new study finds they can purge and repair genetic mutations that would ...

By understanding how hormones influence sexual health, individuals can take informed steps to maintain both their overall wellness and their intimate relationships.

The tiny Amazon molly (Poecilia formosa) has always fascinated researchers because, according to the rules of evolution, it shouldn't have survived as a species, let alone thrive as a species for over ...

The ovaries age faster than other organs, decreasing fertility over time. This article explores drivers of ovarian aging and ...