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 ...

If you have large testicles without other symptoms like pain, you likely don’t need to worry. But if a size change occurs in adulthood, you may have a medical condition causing swelling. The testicles ...