Abnormal testicular descent is common in malformations of the male reproductive system and contributes to factors such as abnormal or absent spermatic cord-like leads, insensitivity of the testes to gonadotropins and loss of descent; and lack of sufficient maternal gonadotropins to affect the descent. Unilateral is often associated with local mechanical factors. For treatment, ectopic testes should be ruled out first. The length of the spermatic cord of an ectopic testis is usually sufficient to fix the testis in the scrotum. Patients with cryptorchidism still have the possibility of the testicle descending into the scrotum on its own within one year of age. If it does not descend after one year of age, HCG can be applied. If it still does not descend at the age of 2, surgery should be performed. The timing of surgery should not be too late.