Testicles, also called testes or balls, are oval-shaped organs that sit in a sac that hangs behind the penis. The main job of testicles is to make sperm and produce testosterone. Testosterone is ...

Researchers at Israel's Bar-Ilan University have grown "laboratory testicles" they hope could eventually ease male infertility, which affects 10% to 15% of American men. Getty Stock Image This is ...

Testicle sizes vary widely. Smaller testicles are not usually a problem. However, small testicles can sometimes indicate a health condition. As well as length, health professionals sometimes ...

As a person ages, the scrotum, the sack that holds the testicles, loses elasticity, and the skin starts to sag. Certain medical conditions can also cause the skin to appear saggy. As people age ...