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Lunar and menstrual phase locking

W B Cutler

    American Journal of Obstetrics and Gynecology
    |August 1, 1980
    PubMed
    Summary
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    Women with menstrual cycles similar to the moon

    Area of Science:

    • Reproductive endocrinology
    • Lunar influences on human physiology

    Background:

    • The menstrual cycle is a complex hormonal process.
    • Potential correlations between lunar cycles and female reproduction have been historically observed.

    Purpose of the Study:

    • To investigate the relationship between menstrual cycle duration and ovulation timing relative to lunar phases.
    • To examine if irregular menses patterns correlate with specific lunar cycle phases.

    Main Methods:

    • Prospective tracking of menstrual cycle records for 312 women.
    • Analysis of ovulation timing in relation to lunar phases (dark phase: last quarter to first quarter).

    Main Results:

    • Women with menstrual cycle durations approximating the lunar cycle (29.5 days) tended to ovulate during the lunar dark phase.
    Keywords:
    Correlation StudiesDouble-blind StudiesEvaluationMenstrual CycleMenstruationOvulationProspective StudiesReproductionResearch MethodologyStatistical StudiesStudies

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  • Women with irregular menstrual cycles also showed a tendency to ovulate during the lunar dark phase.

    • Conclusions:

    • Menstrual cycle length and regularity may be associated with ovulation timing during the lunar dark phase.
    • Further research is warranted to explore the biological mechanisms underlying this potential association.