This disorder occurs when one or both testicles fail to move into the scrotum prior to birth. Usually the testicles will descend into the scrotum without any intervention during the first year of life. If this does not occur, hormonal injections may be given or surgery may be performed to cause the testicles to descend. This disorder can result in infertility in later life, if the testicles do not descend.

A term used to describe testicles, which have not descended into the scrotum. A correctional operation is usually performed in infancy.

A condition in which one or both testicles fail to move from the abdomen, where they develop before birth, into the scrotum. Undescended testicles may increase the risk for development of testicular cancer. Also called cryptorchidism.

Failure of a baby boy's testicles to descend into the scrotum by the time he is born. Many times the condition corrects itself. Other cases need to be surgically corrected.

The failure of the testicles to descend from the abdominal cavity into the scrotum by one year of age. If not repaired by age six, may result in permanent fertility loss.