Periods Pattern Snapshot can be a place to start if you are searching for information about perimenopause or menopause periods pattern changes.
In Menopause: Symptoms – Changes To Your Periods the (United Kingdom) NHS (National Health Service) note:
In Menstrual Cycle: What’s Normal, What’s Not – How Can I Track My Menstrual Cycle? the (United States) Mayo Clinic explain:
In Menstrual Calendar the North American Menopause Society provide a calendar to use to record your menstrual pattern.
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