PCOS Has Been Renamed PMOS - Here's What You Need to Know

This week, polycystic ovary syndrome (PCOS), one of the most common hormonal conditions affecting women worldwide, was officially given a new name. It is now called polyendocrine metabolic ovarian syndrome, or PMOS.

It might sound like a small change. But for the millions of women who have spent years feeling dismissed, misdiagnosed or confused about their own bodies, this is a genuinely significant moment.

 

Why Has the Name Changed?

The rename was announced on 12 May 2026, published in The Lancet and presented at the European Congress of Endocrinology in Prague. It followed a global process spanning over 11 years, involving 56 leading academic, clinical and patient organisations and gathering input from more than 14,300 patients and health professionals across the world.

The conclusion was clear: the old name was causing harm.

'Polycystic Ovarian Syndrome' implied that the defining feature of the condition was cysts on the ovaries. But this was never accurate. Many women with PCOS had no cysts at all. Because of this, women whose scans looked normal were routinely dismissed, even when they were experiencing a wide range of very real symptoms.

The World Health Organisation estimates that up to 70% of people with this condition remain undiagnosed and the misleading name is a central part of why.

 

What Does PMOS Actually Mean?

The new name was chosen deliberately, with each word reflecting what the condition truly is:

Polyendocrine — recognises that multiple hormones are involved, not just one. Insulin, androgens (like testosterone) and neuroendocrine hormones all play a role. This has never been a single organ issue.

Metabolic — acknowledges the condition's deep connection to metabolism, insulin resistance and long-term health risks including type 2 diabetes and cardiovascular disease.

Ovarian — keeps the ovaries in the picture, as ovulatory dysfunction remains a key feature of the condition.

Syndrome — reflects that this is a cluster of features, and that no two patients will present the same way.

Together, these words finally capture what patients and clinicians have known for years: this is a complex, whole-body hormonal and metabolic condition - not a problem about cysts.

 

What Does This Mean for You?

If you currently have a PCOS diagnosis, nothing about your condition changes overnight. The three year transition period now underway will see the new name introduced into medical education, electronic health records and international disease classification systems globally, meaning adoption will be gradual but consistent.

What does change is the conversation. A name that leads with hormones and metabolism means doctors are more likely to look at the full picture. It means women who don't have visible cysts are less likely to be turned away. It means the condition will be taken as seriously as the long-term, complex health issue it has always been.

As Rachel Morman, Chair of Verity (PCOS UK) and patient advocate on the renaming process, put it: "This shift will reframe the conversation and demand that it is taken as seriously as the long-term, complex health condition it is."