Myths vs facts: Insulin and fertility

Insulin and fertility are deeply connected, yet several myths obscure this relationship. A common myth: 'Insulin only matters for diabetes.' In reality, insulin is a master metabolic hormone, and insulin resistance—where cells become less responsive—can directly impair ovarian function. In women with PCOS (Polycystic Ovary Syndrome), insulin resistance is the norm, not the exception, even in those with a normal BMI. Excess insulin drives androgen production, disrupts ovulation, and reduces egg quality. Another myth: 'Only overweight women have insulin issues.' Lean women can also develop insulin resistance, often with normal fasting glucose. Measuring fasting insulin, HOMA-IR, or an oral glucose tolerance test can reveal hidden metabolic dysfunction. Importantly, a fertility test that only checks classic hormones like AMH or FSH misses the insulin component. Strong evidence from large cohorts and intervention trials (e.g., metformin in PCOS) supports this link. However, no single biomarker replaces a thorough medical workup. The information provided here does not substitute professional medical advice.