An index that estimates insulin resistance from fasting glucose and fasting insulin.
Why it matters for PCOS
HOMA-IR is worked out from fasting glucose and fasting insulin, giving a single figure that estimates the degree of insulin resistance without complex testing. Insulin resistance is common in PCOS and can contribute to irregular cycles and androgen-related signs, so the value is sometimes used to gauge metabolic risk. That said, HOMA-IR is not used widely in routine PCOS diagnosis and is not part of the diagnostic criteria.
A high HOMA-IR suggests possible insulin resistance, while a low value suggests better insulin sensitivity. The number should be read alongside your glucose, HbA1c, and overall clinical picture rather than on its own, and reference ranges differ between laboratories, so a value from one lab cannot always be compared directly with another.
How the value is obtained
Because the calculation needs fasting insulin, the test is usually done in the morning after an overnight fast. Fasting insulin is not always part of a standard blood panel at the clinic, so it may need to be requested specifically. Some doctors rely more on an oral glucose tolerance test or HbA1c because those are more standardised and easier to interpret across laboratories. You can read more on the insulin resistance page to understand how this links to PCOS.
What it means for you
A single HOMA-IR value does not tell the whole story. It is one signal, not a diagnosis, and it does not set treatment on its own. Lifestyle changes such as a more balanced eating pattern and regular movement are often discussed to support insulin sensitivity, but any decision about medicine or supplements should be made with a doctor. See also the what is PCOS page for broader context, or the PCOS symptoms page if you are trying to make sense of the signs you notice.
When to talk to a doctor
If you have signs such as irregular periods, weight that is hard to manage, or a family history of diabetes, a doctor can judge whether metabolic testing suits you and how to interpret the results. They will look at the whole picture, including your health history and examination, rather than one number.
This glossary is education, not diagnosis. For your own situation, ask a doctor or pharmacist.