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Research Article| Volume 137, ISSUE 7, P834-839, August 01, 1980

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Lunar and menstrual phase locking

  • Winnifred Berg Cutler
    Correspondence
    Reprint requests: Dr. Winnifred Cutler, Department of Physiology, Stanford University, Stanford, California 94305.
    Affiliations
    Department of Biology, University of Pennsylvania Philadelphia, Pennsylvania, USA.
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DOI:https://doi.org/10.1016/0002-9378(80)90895-9
Lunar and menstrual phase locking
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      Abstract

      In a selected population of 312 women, prospective menses records were maintained during the autumn of 1977. Women whose menstrual cycle duration approaches the cycle duration of the earth's moon (29.5 days) tend to ovulate in the dark phase of the lunar period. The dark phase encompasses the half-cycle of the month from last quarter, through new moon, to first quarter. Women showing irregular menses also tended to ovulate during the dark phase of the lunar period.
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      Article info

      Publication history

      Accepted: December 31, 1979
      Received in revised form: December 21, 1979
      Received: May 18, 1979

      Identification

      DOI: https://doi.org/10.1016/0002-9378(80)90895-9

      Copyright

      © 1980 Published by Elsevier Inc.

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