Insulin Resistance / Metabolic Dysfunction

By RRM Academy Reviewed by Dr. Naomi Whittaker, MD, Board-Certified OBGYN, MIGS, NFPMC, FCI Updated May 14, 2026

Insulin resistance is a state in which cells fail to respond normally to insulin, requiring progressively higher circulating insulin levels to achieve normal glucose uptake. In reproductive medicine, insulin resistance is most clinically significant in PCOS, where it is present in an estimated 50 to 70% of affected individuals regardless of body weight.¹ The mechanism linking insulin resistance to ovulatory dysfunction is direct: hyperinsulinemia stimulates ovarian theca cells to overproduce androgens, which disrupts follicle maturation and suppresses ovulation.

This pathway explains a significant portion of the anovulatory infertility seen across PCOS phenotypes, including lean PCOS where insulin resistance may be present without BMI elevation.² Androgen excess shortens the follicular phase, impairs mucus quality, and can disrupt the luteal phase, creating a compounding effect on cycle competence. Understanding insulin resistance as the upstream metabolic driver reframes PCOS from a hormone disorder to a metabolic condition with hormonal consequences.³

Interventions targeting insulin sensitivity can restore ovulation in some women independently of significant weight change.⁴ Myo-inositol has a documented role in improving insulin signaling in PCOS and is among the nutritional options with published clinical evidence.⁵ Because insulin resistance compounds hormonal abnormalities across multiple axes, addressing metabolic function is part of root-cause evaluation rather than an adjunct to it.

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.