

The testicles develop before birth in the abdominal cavity. Normally, they descend into the scrotum before birth. Undescended testicle occurs when one or both testicles fail to move into the scrotum prior to birth.
Cryptorchidism; Empty scrotum - undescended testes; Scrotum - empty (undescended testes); Monorchism; Vanished testes - undescended