PCOS renamed PMOS: what the new name means

Author: Jessica Lloyd
Senior Vulvovaginal Speciliast Naturopath | BHSc(N) | ISSVD, ISSWSH, BSSM, ATMS

Last reviewed: June 26, 2026

After decades of complaints that the name was misleading, polycystic ovary syndrome (PCOS) has officially been renamed. As of May 2026, the condition is called polyendocrine metabolic ovarian syndrome (PMOS), following a global consensus published in The Lancet.¹

PCOS’s new name is PMOS, and if you have the condition this is more than a cosmetic change. The old name had been blamed for delayed diagnoses, confusion and stigma, and the rename is meant to start fixing that.¹

The reframing matters because it shifts the story away from the ovaries alone and towards the whole-body, hormone-and-metabolism picture clinicians actually see. In our clinic, we meet people who were told nothing was wrong and sent away, even though their cycles, skin, weight and blood sugar were telling a very different story.

Why was PCOS renamed?

The old name was inaccurate and misleading. ‘Polycystic ovarian syndrome’ implies the core problem is cysts on the ovaries – but those ‘cysts’ are not really cysts at all. They are small, immature egg-containing follicles, and plenty of people with the condition do not have that ovarian appearance anyway.¹

Naming the syndrome after a feature that is neither universal nor central pushed everyone, including doctors, to look in the wrong place. The ovary-focused name has been linked to delayed diagnosis, fragmented care and stigma¹, and the World Health Organization estimates that around 70 per cent of people with the condition are never diagnosed.⁴

What does ‘polyendocrine metabolic ovarian syndrome’ mean?

The new name is built to describe what the condition actually is, in three parts:¹

Polyendocrine – several interacting hormone disturbances, including insulin, androgens and neuroendocrine hormones
Metabolic – features like insulin resistance and weight changes, with higher risks of type 2 diabetes and cardiovascular disease
Ovarian – the ovulation problems and infertility that remain defining features

In other words, the new name spells out that this is a hormonal and metabolic condition that also affects the ovaries – not an ovarian condition that happens to disturb your hormones. A severe, mostly postmenopausal relative of this condition is ovarian hyperthecosis.

Insulin resistance sits at the centre for most people with the syndrome, including many who are not overweight, and it drives the long-term risks of type 2 diabetes and cardiovascular disease.^3,5 There is a microbiome thread here too: research links the condition to shifts in the gut and vaginal microbiomes, and to the way gut bacteria recycle oestrogen – what is known as the estrobolome. We cover that in PCOS, BV and the vaginal microbiome and in what is the estrobolome. In our experience, the metabolic and microbial sides of this condition tend to travel together.

How was the name change decided?

The change came out of a rigorous, multistep global consensus: 56 academic, clinical and patient organisations, iterative worldwide surveys gathering more than 14,000 responses from patients and health professionals, and formal methods like modified Delphi surveys and workshops. Agreement on the new name was reached in February 2026, and the work was published in The Lancet and presented at the European Congress of Endocrinology in Prague.^1,2

This was not a quick rebrand – it followed more than a decade of debate.² Support was strong but not unanimous: 86 per cent of patients and 71 per cent of health professionals backed a new, biologically accurate name over keeping the PCOS acronym.³

The people who actually live with the condition helped choose the name, rather than having it handed down to them.

What changes for people with PMOS?

Day to day, not much changes overnight. A diagnosis still stands, and the criteria used to diagnose it are not being thrown out. The rename rolls out gradually through clinical guidelines, medical education and disease classification systems such as the International Classification of Diseases (ICD), so you will likely see both names used for a while.¹ The International Guideline for the condition, used in 195 countries, is expected to adopt the new terminology in 2028.³

The condition is still identified from the clinical picture – irregular cycles, signs of excess androgens such as acne or unwanted hair growth, and ovarian features on ultrasound – rather than a single test. If you want the detail, our explainer on the Rotterdam criteria for diagnosing PCOS walks through it.

The point of the change is what it unlocks over time: less confusion about what the condition is, faster diagnosis, and care that treats the whole picture – metabolic, hormonal and reproductive – instead of just the ovaries.

What this means for you

At My Vagina, we welcome anything that gets women and people with ovaries diagnosed faster and taken seriously – and this condition affects an estimated 170 million people worldwide.⁴

In our clinic, we see people who have never been clearly told how their hormonal picture relates to insulin resistance. Too often that means going straight onto the pill, which masks the problem rather than dealing with what is driving it.

In our experience, most people can manage the metabolic side with food, targeted supplements and exercise – and for the majority, keeping periods regular and protecting fertility is doable without medication.

If you have PMOS, the practical advice has not changed: keep working with your clinician on the hormonal and metabolic drivers, because those are what shape your symptoms, fertility and long-term health. A new name does not replace a management plan – but it should make getting the right one a little easier.

Is everyone happy about the change?

Not entirely. The new name had strong but not unanimous backing – 86 per cent of patients and 71 per cent of health professionals supported a change, which leaves a real minority, especially among clinicians, who did not.³ The authors also flagged limits to the process, including lower participation from some low- and middle-income countries.³ And a decades-old acronym is expensive to retire: textbooks, organisations and clinics all built their language around ‘PCOS’.

The deeper point is the one we would make in clinic: a more accurate name is welcome, but it does not, on its own, close the gaps in care. People still wait years for a diagnosis, and the metabolic and mental-health sides are still under-treated. A better label only helps if it changes what happens at the appointment.

Frequently asked questions

Is PCOS now called PMOS?

Yes. As of May 2026, PCOS is now called PMOS – polyendocrine metabolic ovarian syndrome. It is the same condition under a clearer name, and nothing about your body has changed. Both names will be in use during a three-year transition, so you will still see PCOS for a while.¹

Do I need to be re-diagnosed?

No. If you already have a PCOS diagnosis, it carries over to PMOS. The diagnostic criteria themselves are not being scrapped.¹

Why does the metabolic side matter so much?

Because insulin resistance sits at the centre of the condition for most people, and it drives long-term risks such as type 2 diabetes and heart disease. Treating the metabolic root can also help restore ovulation, which is why the new framing matters for fertility as well as general health.⁵

Why not just keep the name PCOS?

Because it was misleading. The ‘cysts’ it refers to are normal follicles, not true cysts, and the ovary-centred name obscured the hormonal and metabolic core of the condition – which delayed diagnoses and added stigma.¹

Will my treatment change?

Not immediately. Treatment follows the existing evidence; what should improve over time is earlier, clearer diagnosis and more joined-up care as guidelines and education catch up to the new name.¹

What to do next

If you have irregular cycles, acne, unwanted hair growth, weight changes or trouble conceiving and have never had a proper work-up, this is a good moment to ask for one – including blood-sugar and cardiovascular checks, not just an ovary scan. The name change is meant to make exactly that conversation easier.

For tailored guidance you can ask Aunt Vadge’s Assistant, the chat widget in the bottom left of your screen, or book in with one of our practitioners for a full assessment.

This article is general information, not a substitute for personalised medical advice. If you have PMOS, or think you might, please talk to your own clinician about your situation.