Do some people only have one testicle?

Yes, it is possible for people to only have one testicle, a condition known as monorchidism. There can be one of some reasons why a person might only have one testicle, including:

- Congenital anomalies: In some cases, a person is born with only one testicle, which may not have developed properly or descended into the scrotum.

- Testicular torsion: If the spermatic cord becomes twisted, the testicle may not receive blood supply and may need to be removed to prevent further complications.

- Trauma or injury: Sometimes, a testicle may be damaged or lost due to an injury or trauma.

- Cancer: In cases where testicular cancer is present, the affected testicle may need to be removed as a treatment.