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 the ...

As with every other body part, testicle size varies from person to person, often with little or no effect on health. Measuring the size of your testes is usually done with an ultrasound. This painless ...

Testicular pain affects your testicles, the small reproductive organs inside your scrotum. Your scrotum is the pouch of skin behind your penis. Most men experience testicular pain at some point. It’s ...

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, skin ...

Researchers believe they have found which species has the largest testicles in relation to body weight on the planet -- and why. One of the researchers said, "We couldn't believe the size of these ...

The scrotum is a mystery. Why do most male mammals have their reproductive glands so vulnerably located in a sack of skin and muscle outside the body? According to new research, the answer might be ...