Effect of different doses of DEHP on serum testosterone concentrations in fetal males on GD 18 (ANOVA on log-transformed data, P <0.05). Values represent the mean ±SEM. Treatments with the same letter are not significantly different from each other but are statistically different from groups with other letters. a vs. b, P<0.1; b vs. c, P<0.05, b*vs. c, P=0.08. Sample sizes were: Oil n=21, 0.5 μg n=12, 1 μg n=11, 5 μg n=11, 500 μg n=13, 50 mg n=16, 500 mg n=18.