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

Researchers mapped Y chromosome loss across thousands of individual cells from human cancers, with disturbing results.

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

After only five minutes of exposure to the parasite, 22.4% of sperm cells were beheaded. The number of decapitated sperm increased the longer they interacted with the parasites.

Human sperm can swim through surprisingly viscous fluids with ... Scanning electron micrograph of a sperm cell in a fallopian tube. (Science Photo Library/Canva) However, nature is chaotic, and not ...

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 evolved testicles of all different sizes. In almost all these separate cases, ...

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 ...

STAR, a new AI fertility tool developed by Dr. Zev Williams, has helped a couple who struggled to conceive for 18 years get pregnant.