Human testicles are much smaller, in proportion, to some of our primate cousins. Evolution can tell us why. But the size of ...

In her new book "The Stronger Sex," science journalist Starre Vartan dispels myths and misconceptions about the female body.

The membrane-bound organelle appears to play a huge role in helping cells sort, discard, and recycle their contents. It's ...

Scientists found microplastics in fluids around human eggs and sperm. Plastics from cookware and packaging affect human fertility.

Is A Cat Poop Parasite Decapitating Human Sperm Contributing To Rising Infertility? Research suggests Toxoplasma gondii can infect male testes and wreck havoc on sperm.

If we look across the whole of the mammal branch of the tree of life we find there are many groups of mammals that have ...

Sperm health beyond cold storage In addition to sperm freezing, companies like Legacy offer something else that is highly recommended for all men: sperm testing.

The human body is a machine whose many parts – from the microscopic details of our cells to our limbs ... The colobus with his harem can get away with producing a bare minimum of sperm – if a droplet ...

The human body is a machine whose many parts – from the microscopic details of our cells to our limbs, eyes, liver and brain – have been assembled in fits and starts over the four billion years of our ...