GPX1 and polycystic ovary syndrome: The multinomial logistic regression model including age and BMI as covariates showed that compared with the subjects carrying the PP/VV genotype, the individuals carrying both the GPx1 L (PL+LL genotype) and SOD2 A (AV+AA genotype) alleles have the highest risk of PCOS (OR = 5.774, 95%CI: 2.243–14.863, P < 0.001, Table 3).