PCOS has a new name. What changes — and what doesn't

The condition known as PCOS (new name: PMOS — polyendocrine metabolic ovarian syndrome) received an internationally agreed new name in May 2026. For a while you will see both names used side by side.

The most important thing: it is the same condition. The name changed, not the diagnosis. If your records say PCOS, your diagnosis remains valid and nothing needs to be "exchanged". The name change by itself also does not change how the condition is treated — do not stop or adjust your therapy because of it; everything concerning your care is decided together with your doctor.

Why was the name changed? The old one suggested that the essence of the condition is ovarian "cysts". In fact, the changes seen on ultrasound are not typical cysts, and the condition itself concerns above all hormones and metabolism — it can affect the cycle, skin, mood and metabolic health. The new name reflects this better.

For some time both names will function in parallel — in records, referrals and online you will meet PCOS, PMOS or both. This is a planned transition period. Older materials that use the name PCOS do not become outdated or wrong because of it. If a document uses a name you don't recognise, simply ask your doctor whether it refers to the same diagnosis.

What to do: nothing urgent. At your next appointment you can ask which name your doctor uses. When searching for information, check both names.

New worrying symptoms — especially abnormal bleeding — should be discussed with a doctor regardless of your diagnosis: book an appointment at the earliest available date.

Sources: [1] Endocrine Society — name-change announcement (12 May 2026); [2] Teede et al., The Lancet (2026).