DURATION OF THE PRE-MENSTRUAL PHASE OF THE MENSTRUAL-CYCLE ESTIMATED BY ESTROGEN AND LH URINARY-EXCRETION AND BASAL BODY-TEMPERATURE

  • 1 January 1982
    • journal article
    • research article
    • Vol. 27  (2) , 105-108
Abstract
Three women recorded their daily basal body temperature and collected 24-h urine specimens for total estrogens and LH [luteinizing hormone] measurement during 12 consecutive cycles and 1 woman did so for 6 consecutive menstrual cycles. The variability in the time relationship between these indices of ovulatory events in serial cycles is presented. In the pooled data the duration of the premenstrual phase from estrogen peak, LH peak and temperature rise, to the end of the cycle is 12.9, 12.1 and 10.8 days, respectively. The time differences between these indices are biological constants.

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