Medical Sources & Clinical Citations

Last audited: September 2026

Luna grounds all cycle calculations, phase modeling, and health pattern tracking in peer-reviewed clinical guidelines published by premier international medical authorities. In compliance with Apple App Store Guideline 1.4.1 (Medical Citations), Luna maintains verifiable references to authoritative medical literature.

The American College of Obstetricians and Gynecologists (ACOG)

Fertility Awareness-Based Methods of Family Planning (FAQ049)

Clinical calculation basis for ovulation timing (~14 days prior to menstruation) and estimated fertile window duration.

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American College of Obstetricians and Gynecologists (ACOG)

Committee Opinion No. 651: Menstruation in Girls and Adolescents: Using the Menstrual Cycle as a Vital Sign

Reference ranges for normal adult menstrual cycle lengths (21–35 days), cycle variability thresholds, and irregularity tracking standards.

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National Institutes of Health (NIH / NICHD)

About Menstruation and Menstrual Cycle Physiology

Biological standards for menstrual phases (Menstrual, Follicular, Ovulatory, Luteal), endocrine hormone fluctuations, and symptom correlation.

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The American College of Obstetricians and Gynecologists (ACOG)

Premenstrual Syndrome (PMS) (FAQ057)

Clinical guidelines on premenstrual physical symptoms, emotional and mood variations, and phase-correlated wellness patterns.

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World Health Organization (WHO)

Family Planning: A Global Handbook for Providers (3rd Edition)

Evidence-based clinical guidelines on reproductive biology, cervical fluid observation, and basal body temperature logging standards.

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Clinical Methodology & Mandatory Medical Disclaimer

Predictions in Luna are calculated using statistical analysis of your own historical cycle data and peer-reviewed biological averages from ACOG, WHO, and NIH. Luna is strictly an educational wellness companion. Luna is not FDA-cleared birth control, does not diagnose medical conditions, and should never replace professional consultation with a qualified gynecologist or healthcare provider.