In this regard results of genotyping of the CYP1A1*2A gene polymorphisms on North Iranian men with idiopathic infertility showed the frequency of TT, TC, and CC genotypes of CYP1A1 polymorphism in the controls were the same with infertile men; authors also reported that CYP1A1 polymorphism did not display any association with male infertility in Iranian population (87). The gene discussed is CYP1A1; the disease is Infertility.