PCOS is Now PMOS: Why the Name Changed and What It Means

For decades, the condition known as Polycystic Ovary Syndrome (PCOS) has been one of the most misunderstood and misdiagnosed conditions in women’s health.

Now, after more than 14 years of international research and consultation, experts have officially renamed PCOS to Polyendocrine Metabolic Ovarian Syndrome (PMOS).

For many women, this is far more than a simple name change. It represents a major shift in how the condition is understood, diagnosed and treated.

Why Was PCOS Renamed?

The original name “Polycystic Ovary Syndrome” has long been criticised for being scientifically inaccurate and misleading.

The biggest issue?
Many women diagnosed with PCOS do not actually have ovarian cysts.

What appears on ultrasound are often immature follicles rather than true cysts, and some women with the condition may not have any ovarian changes visible at all.

The old name also placed too much emphasis on the ovaries and fertility, when the condition actually affects the entire body, including:

Hormones and endocrine function

Insulin and blood sugar regulation

Metabolism and weight regulation

Skin and hair health

Mental health

Cardiovascular risk

Fertility and ovulation

Experts argued that the term PCOS caused confusion among both patients and healthcare professionals, often delaying diagnosis and appropriate treatment.

Who Led the Change?

The global renaming initiative was led by Helena Teede from Monash University, alongside an international collaboration of researchers, clinicians, medical societies and patient advocacy groups.

The process involved:

More than 50 medical and patient organisations

International workshops and expert panels

Thousands of survey responses from women living with the condition and healthcare professionals worldwide

The new terminology was officially published in The Lancet and announced at the European Congress of Endocrinology.

What Does PMOS Mean?

The new name — Polyendocrine Metabolic Ovarian Syndrome — better reflects the true nature of the condition.

Polyendocrine

Indicates that multiple hormone systems are involved, not just the ovaries.

Metabolic

Acknowledges the strong links with:

Insulin resistance

Weight gain

Blood sugar dysregulation

Increased risk of type 2 diabetes

Cardiovascular disease

Ovarian

Recognises that the ovaries are still involved, particularly with ovulation and reproductive symptoms.

Syndrome

Reflects that PMOS can present differently from person to person.

Why This Matters

Many women with PMOS have historically felt dismissed because their symptoms did not “fit” the outdated understanding of PCOS.

Some women struggled with:

Acne or hair growth but regular periods

Weight gain and insulin resistance without ovarian cysts

Fertility issues without obvious hormonal abnormalities

Anxiety, fatigue or inflammation that were overlooked

The fertility-focused label also meant that metabolic and long-term health risks were often missed.

Researchers hope the new name will encourage:

Earlier diagnosis

Better metabolic screening

More holistic treatment

Increased research funding

Greater public awareness

Reduced stigma

What Changes for Patients?

Importantly, the condition itself has not changed — only the terminology.

Current diagnostic criteria and treatments remain largely the same for now.

However, the renaming is expected to gradually influence:

Medical education

Clinical guidelines

Research priorities

International disease classification systems

The transition to the new terminology is expected to occur over the next several years, with full integration anticipated in future international guidelines and classification systems.

A More Accurate Understanding of Women’s Health

For many women, the shift from PCOS to PMOS feels validating.

Many women have expressed that the old name contributed to years of confusion, dismissal and delayed diagnosis.

The new name acknowledges what many patients and practitioners have long recognised — this is not simply an ovarian condition. It is a complex endocrine and metabolic condition that affects the whole body and often changes throughout life.

And perhaps most importantly, the change may finally help move the conversation beyond fertility alone and toward long-term metabolic, hormonal and overall health.