Womens Health

    Menstrual Cycle Regulation

    Normalization of menstrual cycle length and regularity, supporting reproductive health and hormone balance. Achieved through hormonal support and addressing underlying imbalances.

    TL;DR

    A healthy cycle runs 24-38 days with predictable ovulation. Irregularity usually signals PCOS, thyroid disease, hypothalamic suppression from underfuelling or stress, or perimenopause — each with a different fix.

    Why It Matters

    The menstrual cycle is a monthly readout of hypothalamic, pituitary, thyroid and ovarian function, which is why irregularity is worth investigating rather than tolerating. Chronic anovulation means chronic unopposed oestrogen, which raises endometrial hyperplasia risk over years. It also means low progesterone, which many women experience as poor sleep and heightened anxiety in the second half of the cycle. Restoring ovulatory cycles is therefore about more than fertility.

    How to Measure

    Track cycle length for at least three months. Confirm ovulation with a mid-luteal progesterone test seven days before the expected period, or with LH urine tests plus basal temperature. Investigate irregularity with TSH, prolactin, LH, FSH, total and free testosterone, SHBG and, where PCOS is suspected, fasting insulin and a pelvic ultrasound.

    Biomarkers

    Cycle length and variability
    Mid-luteal progesterone
    LH to FSH ratio
    Total and free testosterone
    SHBG
    TSH and prolactin
    Fasting insulin and HOMA-IR
    AMH

    Optimization Protocol

    Identify the mechanism first, because the treatments diverge sharply. In PCOS with insulin resistance, myo-inositol 4 g daily in the 40:1 ratio with d-chiro-inositol restores ovulatory cycles in most women over 3-6 months, and resistance training amplifies the effect. In hypothalamic amenorrhoea from underfuelling or excessive training, the fix is more energy and less training volume — supplements are irrelevant and inositol will not help. Treat thyroid disease and hyperprolactinaemia medically. Across all causes, adequate sleep, stable body weight and managing chronic stress support hypothalamic signalling. Where cycles remain absent for more than three months despite intervention, seek medical review.

    Lifestyle Levers

    • •Adequate energy intake — avoid chronic underfuelling
    • •Resistance training 2-3 times weekly
    • •Consistent 7-9 hours of sleep
    • •Stable body weight
    • •Reduce excessive endurance training volume
    • •Manage chronic stress
    • •Limit alcohol

    Supporting Supplements

    Vitex (Chasteberry)

    Herb
    Likely effective
    Moderate Evidence

    Cycle irregularity linked to luteal insufficiency often improves with chasteberry.

    Myo-Inositol

    Compound
    Likely effective
    Moderate Evidence
    Effectiveness 4/5

    Reliably restores menstrual regularity in PCOS by fixing the insulin-androgen loop that suppresses ovulation.

    D-Chiro-Inositol

    Compound
    Mixed evidence
    Moderate Evidence

    Cycle regularity improves in some PCOS trials, but myo-inositol dominant formulas are better supported.

    Supporting Research

    Frequently Asked Questions

    Typical Timeframe

    PCOS-related cycles typically normalise over 3-6 months. Hypothalamic cycles return within 3-6 months of restored energy availability. Thyroid-driven irregularity corrects within 8-12 weeks of adequate treatment.

    Research Summary

    Studies5
    Supplements3

    My Notes

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    This information is for educational purposes only. Always consult a healthcare professional before starting any supplement regimen.