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

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

Salty. Sweet. Bitter. Metallic. Sharp. Sour. You name the flavor, and there’s a high chance your sperm or semen will taste that way one day.

1. Low sperm count One of the most common causes of watery semen is oligospermia (low sperm count), which means your semen contains fewer than 15 million sperm per milliliter of semen.