Cryptorchidism is the retention of one or both testes in the abdomen or inguinal canal. It has an incidence of 1-4.6% in full term males and higher in preterm infants. The exact cause is unknown in most cases but may be due to genetic and environmental factors. Diagnosis involves physical exam and imaging like ultrasound or MRI. Treatment is usually surgical orchidopexy between 6-18 months of age to lower risks of infertility, trauma, torsion, and malignancy. Surgical techniques depend on location of the undescended testis and include inguinal, scrotal, open or laparoscopic procedures. Prognosis is generally good but risks of reduced fertility and