Cryptorchidism, also known as undescended testicles, is a condition where one or both of a male infant's testicles have not moved down into the scrotal sac. Normally, testicles descend into the scrotum before birth, but in some cases, this process does not occur. This condition is relatively common, affecting about 1-4% of full-term and approximately 30% of preterm male infants.
