New research shows female baboons influence fertilization through immune and chemical changes that affect sperm survival.

A genetic study has unveiled that two Neanderthals who lived approximately 10,000 years apart in Siberia's famous Denisova Cave were distant relatives. This remarkable discovery provides the fourth ...

The hectocotylus is both a reproductive and sensory organ, Harvard scientists and others have found. Octopuses are some of ...

As humpback whale numbers climb back after decades of large-scale hunting, scientists are spotting strange things. A new ...

Whether they're offering gifts, courting for weeks or dying during sex, these are the romantic animal species doing courtship ...

Scientists found that the male’s hectocotylus, the specialized arm for mating, is lined with receptors that can sense ...

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

The third right arm of male octopuses has a specialised role in mating, and the creatures take extra care to avoid damaging ...

Coyote mating season is under way in Cook County, and authorities have urged pet owners to be alert. The Cook County ...

Plants and animals have evolved all sorts of ways to make themselves more appealing to potential mates—including colorful feet, flamboyant feathers, complex mating dances and sexual deception. Many ...

Add Yahoo as a preferred source to see more of our stories on Google. Photograph of a pair of túngara frogs (Engystomops pustulosus) in amplexus (male grasping onto female). It’s important to remember ...