Most people with a penis have two testicles in their scrotum — but some only have one. This is known as monorchism. Monorchism can be the result of several things. Some people are simply born with ...

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 ...

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 measure ...