FIG. 5. Dose-response (A) and dosing-timing response (A, B) relationship in the TCDD-induced alteration of StAR, CYP11A1, and CYP17 mRNAs in fetal testis. Each bar represents the mean ± SD of six fetuses, two of which were removed from three different dams. A significant difference from the control is shown by an asterisk (*, P < 0.05, **, P < 0.01).