Normal and Abnormal Testicular Descent in Some Mammals

摘要: The process of testicular descent has provided a classic problem developmental anatomy since the time John Hunter. It also possesses considerable clinical importance anomalies position are frequently encountered in man and several domestic species. In spite great attention subject received Hunter’s description 1762 even recent accounts still contradictory; mechanisms involved not completely understood. Several theories have been put forward to explain changes morphology movement testis from its site origin genital ridge final resting place scrotum. Especially opinions on role gubernaculum differ. results research will be summarized. information is confined species with strip-like cremaster muscle (e.g. pigs, dogs, cats, cattle, horses) sac-shaped rodents), although principle comparable, morphologically different. A normal as well abnormal followed by some notes regulation this process.