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Male infertility

Male refers to a sexually mature male's inability to impregnate a fertile female. Male infertility can wholly or partially account for 40% of infertility among couples who are trying to have children. It affects approximately 7% of all men. Male infertility is commonly due to deficiencies in the semen. Semen quality is used as a surrogate measure of male fecundity. More recently, advanced sperm analyses that examine intracellular sperm components are being developed.

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Plain-language summary adapted from Wikipedia. Not medical advice.