GSR and Infertility: On the other hand, a relatively strong relationship between GR and GPx in the infertile group (r = −0.546), as well as weaker correlations in the healthy control group (SOD-GPx: r = 0.370, SOD-GR: r = −0.337), revealed mutual regulation of antioxidants and emphasized the inter-related nature of the entire system (Table 1).