Male infertility refers to a sexually mature male's inability to impregnate a fertile female.[1] In humans, it accounts for 40–50% of infertility.[2][3][4][5] It affects approximately 7% of all men.[6] Male infertility is commonly due to deficiencies in the semen, and semen quality is used as a surrogate measure of male fecundity.[7] More recently, advance sperm analyses that examine intracellular sperm components are being developed.[2][8]
^Leslie, Stephen W.; Siref, Larry E.; Khan, Moien AB (2020), "Male Infertility", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID32965929, retrieved 2020-11-26