Fertility Awareness-Based Methods (FABMs)

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

An umbrella term for scientific methods used to monitor and interpret biological signs of fertility (biomarkers) throughout the menstrual cycle. FABMs can be used for health monitoring, timing diagnostics and treatments in RRM, and achieving or avoiding pregnancy. A 2025 systematic review of 20,339 participants from 16 studies found that FABMs, when used correctly, were associated with a success rate of over 90% for both contraception and conception purposes. FABMs encourage partner involvement, improve communication, and enhance body literacy by tracking female biomarkers to determine fertility status, and can also help diagnose ovulation-related disorders such as PCOS and endometriosis. Note: The Creighton Model FertilityCare System is specifically classified as an NFP method by its developers and is distinct from the FABM umbrella.⁵⁶

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.