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Intrafollicular levels of E2, E1 and EMs in antral follicles of ovulatory women with regular menstrual cycles and PCOS women without ovarian stimulation. (A) E2 and E1 in ovulatory women and PCOS women (*P < 0.05). (B) 16-kE2, 2-OHE2 and 4-OHE1 in ovulatory women and PCOS women (*P <0 .05). (C) 2-ME2 and 2-ME1 in ovulatory women and PCOS women. Values are mean ± SEM, total n = 20.
