Cryptorchidism (over 90% in some studies). Even after orchiopexy, these may also affect sperm maturation and motility at an older age. The most common diagnostic dilemma in otherwise normal boys is distinguishing a retractile testis from a testis that will not descend spontaneously into the scrotum. Retractile testes are more common than truly undescended testes and do not need to be operated on. In normal males, as the cremaster muscle relaxes or contracts, the testis moves lower or higher ("retracts") in the scrotum. This cremasteric reflex is much more active in infant boys than older men. A retractile testis high in
The Human Condition (Magritte) to the Fields" (1936), its 1964 reincarnation "Evening Falls" and the 1942 work "The Domain of Arnheim", all of which feature broken windows whose shattered glass pieces on the floor still show the outside world they used to conceal. Another series of pieces which show both strong similarities and strong differences from "The Human Condition" are the works titled "The Alarm Clock". In these works, a painting is placed on an easel in front of a window or on a balcony with a simple landscape in the background. However, the painting does not show what may possibly be behind, but