CYP19A1 and female infertility: For GSTM1 null genotype carriers along with the CYP19A1 C allele, there is also a significant association with female infertility risk (OR 7.023; 95% CI (3.627–13.601; p < 0.001), but for individuals with simultaneous CYP19A1 TT genotype, there is no significant increase in female infertility risk (OR 1.216; 95% CI (0.618–2.392; p = 0.346).