Figure 6. Correlations between oxidative stress markers in blood and follicular fluid. (A) A significant positive correlation between concentrations of reactive oxygen species (ROS) in follicular fluid and the GSSG/ GSH ratio in blood, indicating that increased systemic oxidative stress may directly influence the follicular microenvironment. (B) A significant positive correlation between reactive nitrogen species (RNS) levels in blood plasma and follicular fluid, suggesting a link between oxidative states in the two compartments. GSSG=disulfide glutathione; GSH=reduced glutathione; r=Spearman’s correlation coefficient. Significant differences are noted when p-value<0.05.