The first day of menstruation marks the start of the ovarian cycle, comprising phases like follicle growth, egg release, and endometrial degradation, lasting around 28 days. The timing of these cycles, not fully understood by science, may be governed by an internal body clock rather than external factors like the lunar cycle.
New study findings indicate that the rhythmic characteristics of menstrual cycles are probably regulated by an internal mechanism similar to the circadian clock. Analysis of over 31,000 menstrual cycles suggests that the 28-day cycle balance involves endocrine processes, aligning with the concept of an internal body clock controlling the ovarian cycle.
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