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Common genetic disorders that can cause male infertility include: (1) Klinefelter syndrome (Klinefelter sign, congenital testicular hypoplasia) This disease is relatively common, accounting for about 1/500 male newborns. It was developed by Dr. Klinefelter in 1942 The year is described first, hence the name. The disease is usually asymptomatic in childhood, and symptoms appear in adolescence. The typical clinical manifestations are: excessive […]