Introduction
On 12 May 2026, polycystic ovary syndrome (PCOS) got a new name. It's now polyendocrine metabolic ovarian syndrome (PMOS). The condition affects one in eight women, over 170 million people worldwide.
Professor Helena Teede led the consortium of 56 organisations behind the change. The full guideline update lands in 2028. The point of the new name is simple: moving the condition’s focus away from your ovaries and towards your metabolism.
A New Perspective
Here's everything you should know about the new thinking. Insulin drives this condition. Around 60 to 80% of diagnosed women have insulin resistance, and much of it has nothing to do with your weight.
The underlying argument is that high insulin levels (a result of insulin resistance) push your ovaries to produce more testosterone, raising serum testosterone levels. Insulin resistance appears to come first before the heightened testosterone levels, although that order is still an ongoing debate.
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Updated risk profile description
The new name widens the picture of who this condition could affect. You can be slim with normal-looking ovaries and still be affected, for instance if you're insulin resistant. However, the formal diagnostic criteria remain the same until the full guideline update in 2028.
The familiar signs still apply:
Irregular or absent periods
Excess hair growth, acne, or other signs of raised androgens
Weight gain, or trouble shifting weight
It's worth speaking to a GP if you're worried, or checking some biomarker levels.
Which biomarkers to check
If you're worried you might fit the above description, a blood biomarker test could paint a clearer picture.
Here are four biomarkers that are relevant to PMOS and why.
Fasting insulin: More insightful than your blood sugar. A higher readout could indicate the beginning of insulin resistance
HbA1c: Shows your average blood sugar over the past two to three months. It could tell you whether you're drifting towards type 2 diabetes.
Fasting glucose: Checked alongside your insulin, it shows how hard your body works to keep your blood sugar steady. Normal glucose with high insulin is a classic early sign.
Cholesterol markers: Covers different cholesterol types and triglycerides. Insulin resistance tends to push both the wrong way, and they feed straight into your long-term heart risk.
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Lifestyle changes for possible improvements
Just as any other long-term condition, a few daily habits can ease your symptoms.
Avoiding glucose spikes: a low glycemic index diet can improve insulin resistance.
Resistance training: more muscle mass means your body handles insulin better.
Prioritizing sleep: Short or broken sleep pushes insulin resistance up, so aim for 7-8 hours of sleep per night.
These small changes could improve your symptoms, though chat to a GP if you’re looking for contextual insights.
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