PCOS Is Now PMOS: A Complete Guide to the New Name in Women's Health

PMOS, or Polyendocrine Metabolic Ovarian Syndrome, is the new official name for the condition previously known as PCOS (Polycystic Ovary Syndrome). The rename was announced on 12 May 2026 in The Lancet, following a global consensus process spanning more than a decade that involved 56 medical organisations and tens of thousands of patients and clinicians, led by Professor Helena Teede of Monash University. The condition itself has not changed, but the new name better reflects what it actually is: a whole body hormonal and metabolic disorder, not just a problem with the ovaries.

1. What is PMOS?

PMOS, short for Polyendocrine Metabolic Ovarian Syndrome, is a chronic disorder that affects how a woman's body regulates hormones, processes insulin, and produces eggs. It is one of the most common endocrine conditions in women, affecting approximately 1 in 8 women worldwide. Globally, more than 170 million women live with PMOS.

2. Why has PCOS been renamed to PMOS?

The old name, Polycystic Ovary Syndrome, was misleading on two important counts.

First, the so called “cysts” referred to in the name are not actually pathological cysts. They are arrested follicles, which are normal egg sacs that did not release. Most women diagnosed with the condition do not have true ovarian cysts. The name caused widespread confusion: many patients were told they did not have PCOS simply because no cysts appeared on ultrasound, leading to missed diagnoses. The condition was also, at times, overdiagnosed and overtreated.

Second, by focusing attention on the ovaries, the old name obscured the wider hormonal, metabolic, dermatological, and psychological dimensions of the condition. According to the World Health Organization, up to 70 percent of women living with PMOS remain undiagnosed worldwide. The Lancet study concluded that the misnomer contributed to delayed diagnosis, fragmented care, and stigma, while also curtailing research and policy attention.

3. What does each part of the name mean?

The new name was selected to encode the biology of the condition accurately.

4. What changes and what stays the same?

The condition itself has not changed. If you were previously diagnosed with PCOS, you have what is now called PMOS. Your symptoms, treatment plan, and ongoing management do not need to change overnight because of the renaming. However, we do need to ensure that all aspects of the illness are covered in management.

The new name will be fully implemented in the 2028 International Guideline update. During the three year transition period, both names may appear in medical records, research papers, and patient resources.

What the rename is expected to change over time:

• Earlier and broader diagnosis, as clinicians look beyond the ovaries
• More integrated care addressing hormones, metabolism, skin, mood, and fertility together
• Greater research funding and policy attention
• Reduced stigma and clearer communication between patients and doctors
• Updates to clinical guidelines, medical curricula, and international disease classification systems

5. Symptoms of PMOS

PMOS does not present the same way in every woman. Symptoms vary widely in type and severity, and they can change at different stages of life.

Common symptoms include:

• Irregular, missed, or unusually heavy periods
• Difficulty conceiving or unexplained infertility
• Weight gain, particularly around the abdomen
• Insulin resistance, increased hunger, or sugar cravings
• Increased acne
• Excess facial or body hair (hirsutism)
• Thinning hair on the scalp
• Darkened, velvety patches of skin in body folds (acanthosis nigricans)
• Mood changes, anxiety, or depression
• Fatigue and disturbed sleep

Many women experience only a few of these symptoms. The combination, severity, and timing vary from person to person.

6. How is PMOS diagnosed?

PMOS is diagnosed using the Rotterdam criteria, which was updated and reaffirmed in the 2023 International Guideline. A diagnosis in adults requires at least two of the following three features to be present:

Other diagnostic systems are also used, including the NIH criteria and the AE-PCOS Society criteria, which differ only slightly from the Rotterdam criteria.

Your doctor will also rule out other conditions that can mimic PMOS, such as thyroid disorders, raised prolactin, and congenital adrenal hyperplasia. Tests typically include a hormone profile, glucose including HbA1c, lipid profile, and a pelvic ultrasound.

In adolescents, diagnosis is approached more cautiously, as some features such as irregular cycles can be normal during the initial years after the first period.

7. How is PMOS treated?

There is no single treatment for PMOS. Care is tailored to each woman based on her symptoms, age, fertility goals, and metabolic risk.

Lifestyle is the foundation of most treatment plans. Balanced nutrition, regular physical activity, weight management, and good quality sleep significantly reduce insulin resistance and improve symptoms across the spectrum.

Medical treatment is added based on individual need:

• Oral contraceptives regulate periods and reduce symptoms related to high androgens
• Metformin improves insulin sensitivity and regularises menstrual cycles
• Medications that lower androgens help with acne and excess hair growth
• Ovulation induction medications support fertility in women trying to conceive
• Dermatological treatment addresses skin and hair concerns
• Counselling and mental health support address the psychological impact

Most women benefit from care that involves more than one specialty, with treatment coordinated across endocrinology, gynaecology, dermatology, dietetics, and mental health.

8. Long term health risks linked to PMOS

PMOS is not only a reproductive concern. It is associated with a higher lifetime risk of several conditions:

• Type 2 diabetes mellitus
• High blood pressure and cardiovascular disease
• Fatty liver disease and resulting complications
• Endometrial cancer, linked to long periods without ovulation
• Obstructive sleep apnoea and obesity related complications
• Anxiety and depression

Regular health screening, including blood pressure, glucose, lipid profile, and liver function tests, helps identify these risks early. Lifestyle modification and timely medical intervention significantly reduce the chance of long term complications.

9. When should you see a doctor?

Consider consulting a doctor if you experience any of the following:

• Irregular periods. The definition of an irregular menstrual cycle depends on how long it has been since the onset of menstruation (menarche):
  • Within the first year: if the gap between periods is more than 90 days
  • Between 1 and 3 years after periods begin: if a cycle is delayed beyond 45 days, or if periods repeat in under 21 days
  • After 3 years: if periods come less than 21 days apart, or more than 35 days apart
• Difficulty conceiving after 12 months of trying, or 6 months if you are over 35 years of age
• Persistent acne that does not respond to standard skincare
• Sudden weight gain that cannot be explained
• Increased facial or body hair growth
• Thinning of scalp hair
• Symptoms of insulin resistance such as fatigue, especially after a heavy meal, or skin darkening
• Mood symptoms that interfere with daily life

Early diagnosis and integrated care significantly reduce the long term impact of PMOS on your health.

10. PMOS care at Mar Sleeva Medicity Palai

At Mar Sleeva Medicity Palai, PMOS is managed as the whole body condition it is. Our team brings together specialists across endocrinology, gynaecology, dermatology, dietetics, and mental health, so every aspect of the condition is addressed in one place.

Whether you are newly diagnosed, have been managing PMOS for years, or were diagnosed with PCOS and want to understand what the rename means for your care, our team is ready to help.

Disclaimer: This article has been medically reviewed by a qualified doctor and is provided for general awareness. It is not a substitute for an individual consultation, diagnosis, or treatment. For care specific to your situation, please consult our team at Mar Sleeva Medicity Palai.