PCOS IS DEAD. MEET PMOS.
PCOS has officially been renamed Polyendocrine Metabolic Ovarian Syndrome.
Written by Nikki Thornton, qualified nutritionist, PMOS educator and founder of PCOS Revolution
Last updated: July 2026
On 12 May 2026, Polycystic Ovary Syndrome, better known as PCOS, was officially renamed Polyendocrine Metabolic Ovarian Syndrome, or PMOS.
This was not a trendy rebrand.
It was an overdue correction to a name that had misrepresented one of the most common hormonal conditions affecting women for decades.
The old name told doctors, researchers and women to look at the ovaries.
The new name finally tells them to look at the whole system.
Welcome to PMOS.
Is PCOS now called PMOS?
Yes.
PCOS is now officially called Polyendocrine Metabolic Ovarian Syndrome, PMOS.
The new name was selected through an international consensus process involving women with lived experience, healthcare professionals, researchers, patient organisations and medical societies around the world.
The change followed more than 22,000 consultation responses and was supported by 56 patient and professional organisations.
The NHS, the American Society for Reproductive Medicine and the international guideline network now recognise PMOS as the new name for the condition previously called PCOS.
PCOS and PMOS will continue to appear together during the transition, with the new terminology expected to be fully implemented within the 2028 international guideline.
So, for now, you may see:
- PMOS
- PCOS
- PMOS, formerly known as PCOS
- PCOS, now renamed PMOS
They refer to the same condition.
What does PMOS stand for?
PMOS stands for Polyendocrine Metabolic Ovarian Syndrome.
Each part of the new name matters.
Polyendocrine
“Polyendocrine” recognises that the condition can involve multiple interacting hormonal systems.
PMOS is not simply something happening inside the ovaries. Hormonal signalling involving insulin, androgens and the reproductive system may all form part of the picture.
Metabolic
“Metabolic” recognises the links between PMOS and areas such as insulin function, blood-glucose regulation, body composition, cholesterol and long-term metabolic health.
This does not mean every woman with PMOS has the same metabolic presentation.
It means the metabolic dimension can no longer be treated as an inconvenient footnote.
Ovarian
“Ovarian” remains because PMOS can affect ovulation, menstrual cycles, androgen production and fertility.
But the ovaries are one part of the system, not the entire explanation.
Syndrome
A syndrome is a collection of features that may appear differently from person to person.
There is no single PMOS body, symptom pattern or experience.
Why was PCOS renamed?
Because “Polycystic Ovary Syndrome” was misleading.
Despite the old name, a woman does not need to have ovarian cysts to meet the diagnostic criteria.
What have commonly been described as “cysts” are usually ovarian follicles, and a person can meet the diagnostic criteria without having polycystic ovarian morphology on a scan.
The old PCOS name created three major problems.
1. It made the condition sound like an ovarian cyst problem
Women were frequently told that their scan was normal, so they could not have PCOS.
Others were shown follicles and told that the follicles alone proved they had it.
Neither explanation reflected the full diagnostic picture.
2. It reduced a complex hormonal condition to fertility
For decades, PCOS was commonly discussed only when a woman wanted to become pregnant.
Her irregular periods, fatigue, acne, unwanted hair growth, scalp hair loss, weight difficulties, metabolic health and emotional wellbeing were often treated as separate problems.
The system was fragmented because the name was fragmented.
3. It hid the metabolic dimension
The word “metabolic” was missing from PCOS, despite the recognised metabolic features and long-term health considerations associated with the condition.
The PMOS name puts metabolic health where it belongs: inside the main conversation.
Does the PMOS name change alter my diagnosis?
No.
If you were diagnosed with PCOS, you have not suddenly developed a different condition.
You do not need to panic, begin again or persuade your ovaries to complete new paperwork.
Your existing PCOS diagnosis is now described using the name PMOS.
The name has changed because medical understanding and language have caught up with the broader reality of the condition.
The biological features affecting you have not changed overnight.
What are the symptoms of PMOS?
PMOS can present differently in every woman.
Possible features include:
- Irregular, infrequent or absent periods
- Unpredictable or disrupted ovulation
- Difficulty becoming pregnant
- Higher androgen levels
- Excess facial or body hair
- Acne or oily skin
- Thinning hair on the scalp
- Fatigue or low energy
- Weight gain or difficulty managing weight
- Darkened areas of skin
- Mood or emotional wellbeing difficulties
- Insulin resistance or other metabolic health concerns
Having one or two of these symptoms does not automatically mean you have PMOS.
Other hormonal and medical conditions can cause similar symptoms, which is why proper assessment and the exclusion of alternative causes matter.
Is PMOS just a metabolic condition?
No.
Replacing one oversimplification with another would be a particularly human way to waste a historic name change.
PMOS is a polyendocrine, metabolic and ovarian syndrome.
Metabolic dysfunction can be an important part of the condition, but PMOS also includes reproductive, hormonal, dermatological and psychological features.
Not every woman has the same symptoms.
Not every woman is overweight.
Not every woman has obvious insulin resistance.
Not every woman has irregular periods.
Not every woman has follicles visible on an ovarian scan.
The point of the new name is not to force every woman into another narrow box.
It is to make the box large enough to reflect the condition properly.
PCOS vs PMOS: what is the difference?
The simplest answer is:
PCOS is the old name. PMOS is the new name.
PCOS stood for Polycystic Ovary Syndrome.
PMOS stands for Polyendocrine Metabolic Ovarian Syndrome.
The condition has not been replaced. The terminology has been corrected.
The new name places hormonal and metabolic health before the ovaries, reflecting the fact that PMOS is a broader, long-term condition rather than simply an ovarian abnormality.
Will doctors still call it PCOS?
Probably, for a while.
Changing the name of a condition used across medical records, research papers, healthcare systems and public information does not happen instantly.
PCOS and PMOS are expected to coexist during a transition period, with full implementation planned through the 2028 international guideline.
When speaking to a GP or specialist, you can say:
“I have PMOS, previously called PCOS.”
That gives them both the current and familiar terminology.
Why this name change matters
Words determine what gets noticed.
When the condition was called Polycystic Ovary Syndrome, the conversation repeatedly returned to ovaries, cysts, periods and pregnancy.
When it is correctly described as Polyendocrine Metabolic Ovarian Syndrome, the conversation becomes larger.
It includes:
- Hormonal signalling
- Metabolic health
- Ovulation and menstrual cycles
- Fertility
- Skin and hair symptoms
- Cardiovascular risk factors
- Psychological wellbeing
- Long-term healthcare
That shift matters because women deserve support before they are trying to conceive, while they are trying to conceive and long after their reproductive years.
You are not simply a pair of ovaries waiting to produce a baby.
Your health matters across your entire life.
My position on PCOS becoming PMOS
I have spent years teaching women that PCOS was never merely an ovarian cyst condition.
I have repeatedly challenged the idea that irregular periods, stubborn weight changes, fatigue, cravings, androgen symptoms and disrupted ovulation should be treated as unrelated complaints.
They are not random failures.
They are signals from an interconnected biological system.
The official PMOS name does not solve poor care by itself. Doctors still need education. Women still need access to proper testing. Research still needs funding. Metabolic and psychological health still need to be taken seriously.
But language shapes what medicine investigates, what governments fund and what women are taught about their own bodies.
PCOS is dead.
Not because the condition disappeared.
Because the name was no longer good enough.
Frequently asked questions about the PCOS name change
When did PCOS change to PMOS?
Polycystic Ovary Syndrome was officially renamed Polyendocrine Metabolic Ovarian Syndrome on 12 May 2026.
Is PMOS the same as PCOS?
Yes. PMOS is the new name for the condition previously called PCOS.
What is the full meaning of PMOS?
PMOS means Polyendocrine Metabolic Ovarian Syndrome.
Why was the word “polycystic” removed?
The old term created the impression that abnormal ovarian cysts defined the condition. They do not. Many women with the condition do not have polycystic ovarian morphology, and the condition involves broader endocrine and metabolic features.
Do I need a new diagnosis now PCOS is called PMOS?
No. An existing PCOS diagnosis does not become invalid because the terminology has changed.
Should I use PCOS or PMOS?
PMOS is the new name. During the transition, “PMOS, formerly known as PCOS” is the clearest language to use.
Can PMOS affect women without weight gain?
Yes. PMOS can affect women across different body sizes. Weight is not a diagnostic requirement.
Does every woman with PMOS have insulin resistance?
No. Insulin resistance is common and clinically important, but presentations differ and it should not be assumed without appropriate assessment.
Start understanding your PMOS system
You were never failing at having enough willpower.
You were given an incomplete explanation of a complex condition.
The name has changed.
Now the standard of education needs to change with it.
GET THE FREE PMOS STARTER GUIDE
This page is for educational purposes and does not replace individual medical advice, diagnosis or treatment. Speak to an appropriately qualified healthcare professional about symptoms, testing, medication or fertility concerns.
Evidence and further reading
- International Evidence-Based PMOS Guideline, Monash University
- “Polyendocrine metabolic ovarian syndrome, the new name for polycystic ovary syndrome,” The Lancet, 2026
- American Society for Reproductive Medicine: PCOS Is Now PMOS
- NHS: Polyendocrine Metabolic Ovarian Syndrome
