Orchidopexy is done in cases of undescended testes at the age of :

"Congenital undescended testis should be treated surgically no later than 9-15 months. Surgical correction at 6 months is appropriate". - Nelson. Cryptorchidism : An undescended testis (cryptorchid) is the most common disorder of sexual differentiation in boys. At birth, approximately 4 - 5% of boys have an undescended testis. The majority of undescended testes descend spontaneously during the first 3 months of life, and by 6 months the incidence decreases to 0.8%. If the testis has not descended at 4 months, it will remain undescended. Cryptorchidism is bilateral in 20% of cases. Consequences of cryptorchidism : Infertility. Testicular malignancy → Most common seminoma. Psychological effects of empty scrotum. Torsion. Associated hernia.