I'll save this sperm for later, thanks ...

Recognizing when your female dog is in heat is crucial for her well-being and your peace of mind. Understanding the signs and ...

Producing follicles isn’t the only task for ovaries, new research suggests. (Steve Gschmeissner/Science Photo Library/Getty ...

New research suggests that heat stress increases the occurrence of same-sex sexual interactions between male burying ...

As central female reproductive organs, the ovaries produce fertilizable eggs and generate the sex hormones estrogen and ...

New research urges routine screening for female genital schistosomiasis, a neglected disease linked to HIV, cervical cancer, ...

A new study of wild bats reveals that an animal's immune system is shaped by more than its need to fight infections. Researchers from the University of Maryland have found that sex, age and ...

In humans, that supply dwindles until menopause, when it goes bankrupt. Over the past two decades, scientists have identified ...

New research suggests that heat stress increases the occurrence of same-sex sexual interactions between male burying beetles – but also that a ...

These social animals manage friendships, grudges, alliances, family politics, and power struggles that feel surprisingly ...

Genes associated with male reproductive biology appear to be under relaxed selective constraint in a primate species with low sperm competition.

This short film introduces the topic of reproduction and that babies start from an egg and sperm. This series of short films ...