Research

Hormonal

Women with PCOS should undergo screening for impaired glucose tolerance using a 2-hour oral glucose tolerance test (OGTT) rather than fasting plasma glucose alone, as fasting glucose misses a majority of cases in this population.

If you have PCOS, do not rely on a simple fasting blood sugar test to check for diabetes risk. You must get a 2-hour Oral Glucose Tolerance Test (OGTT). This test involves drinking a sugary solution and having your blood drawn twice. It is more accurate for PCOS patients because your fasting sugar might look normal even if your body struggles to handle sugar after eating. This screening should happen at diagnosis and every 2 years, or annually if you have other risk factors.

GoodSupportsHIGH confidence
The panel recommends that all patients with PCOS be screened for IGT with a 2-h oral glucose tolerance test... In the PCOS population studied, fasting plasma glucose measurements by ADA criteria failed to diagnose 58% of women with DM diagnosed by a 2-h OGTT.
Kelsey E. S. Salley et al. · The Journal of Clinical Endocrinology & Metabolism · 2007

Why this rating

Based on a systematic review and expert consensus from the Androgen Excess Society, citing multiple studies showing OGTT superiority in PCOS.

Source

POSITION STATEMENT: Glucose Intolerance in Polycystic Ovary Syndrome—A Position Statement of the Androgen Excess Society

Kelsey E. S. Salley et al. · The Journal of Clinical Endocrinology & Metabolism · 2007

DOI 10.1210/jc.2007-1549

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DOI resolved against Crossref · corpus check 2026-06-10

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