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Plasma Selenium and Plasma and Erythrocyte Glutathione Peroxidase Activity Increase with Estrogen during the Menstrual Cycle

Department of Human Nutrition, The Ohio State University, Columbus, Ohio

View larger version (13K): [in a new window]   Fig. 1. Plasma 17-ß-estradiol concentration (Mean ± SEM, n = 14) measured at four time points during three phases of the menstrual cycle (EF: early follicular; E-1: periovulatory, one day before estrogen peak; E: periovulatory, day of estrogen peak; ML: mid-luteal).

View larger version (13K): [in a new window]   Fig. 2. Plasma selenium concentration (Mean ± SEM, n = 14) measured at four time points during three phases of the menstrual cycle (EF: early follicular; E-1: periovulatory, one day before estrogen peak; E: periovulatory, day of estrogen peak; ML: mid-luteal).

View larger version (13K): [in a new window]   Fig. 3. Plasma GPx activity (Mean ± SEM, n = 14) measured at four time points during three phases of the menstrual cycle (EF: early follicular; E-1: periovulatory, one day before estrogen peak; E: periovulatory, day of estrogen peak; ML: mid-luteal).

View larger version (11K): [in a new window]   Fig. 4. Erythrocyte selenium concentration (Mean ± SEM, n = 14) measured at four time points during three phases of the menstrual cycle (EF: early follicular; E-1: periovulatory, one day before estrogen peak; E: periovulatory, day of estrogen peak; ML: mid-luteal).

View larger version (13K): [in a new window]   Fig. 5. Erythrocyte GPx activity (Mean ± SEM, n = 14) measured at four time points during three phases of the menstrual cycle (EF: early follicular; E-1: periovulatory, one day before estrogen peak; E: periovulatory, day of estrogen peak; ML: mid-luteal).