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Uptodate Reference Title
Testicular descent
Testicular descent
(A) The testes appear on the urogenital ridge (second month). (B) The coelomic cavity evaginates into the scrotal swelling where it forms the processus vaginalis (middle of the third month). (C) Testes begin descent into the scrotum guided by the gubernaculum (seventh month). (D) The processus vaginalis obliterates spontaneously (shortly after birth).
Adapted from: Langman J. Urogenital System. In: Medical Embryology, 4th ed, Williams and Wilkins, Baltimore 1981. p.263.