Figure 3: Alteration in testicular 17 β -HSD (A), 3 β -HSD (B) activities and ROS generation (C) in the rats subjected to perchlorate and co-exposed with excess iodine. Each bar denotes mean±SD of six rats per group. Values are tested for significance by ANOVA at P<0.05 followed by post hoc test. a: compared to the control group; b: compared to the perchlorate group. DCFDA: 20,70-dichlorofluorescin diacetate. reactive oxygen species; ROS: reactive oxygen species.