Marquette Method

By RRM Academy Reviewed by Dr. Naomi Whittaker, MD, Board-Certified OBGYN, MIGS, NFPMC, FCI Updated May 7, 2026

A FABM developed at Marquette University by Dr. Richard Fehring and colleagues that uses the ClearBlue Fertility Monitor to measure urinary estrogen and LH metabolites, producing objective low, high, and peak fertility readings. The monitor-based protocol can be used alone or combined with cervical mucus and basal body temperature observations, depending on user preference. Quantifiable hormone data provides a second independent confirmation of fertility status, which is particularly valuable for women with irregular cycles, postpartum and breastfeeding women, and women in perimenopause, where mucus patterns alone may be harder to interpret. Published effectiveness data from prospective cohort studies report perfect-use pregnancy rates of approximately 2% per year to avoid pregnancy. Marquette is also used clinically through the FACTS (Fertility Appreciation Collaborative to Teach the Science) training program; see Marquette Method Clinical Protocol for the medical-management arm.¹

This content is for educational purposes only and does not constitute medical advice. Consult an RRM clinician or healthcare provider for guidance specific to your situation.