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Changes in estrogen serum levels in pubertal and postpubertal rats after prolonged low-dose exposure to o,p’-DDT during different periods of ontogeny. (A) Estradiol; (B) estrone; (C) estriol; (D) testosterone/estradiol serum ratio in postpubertal rats at 70th day of postnatal development. Data are shown as mean ± SEM. P, day of postnatal development; p < 0.05 compared to control (*), compared to the PPE DDT group (~), and compared to pubertal period (^).
