If you’ve recently heard the term PMOS and wondered what happened to PCOS, you’re not alone. In 2026, an international group of experts officially announced that Polycystic Ovary Syndrome (PCOS) would be renamed Polyendocrine Metabolic Ovarian Syndrome (PMOS). The change reflects a better understanding of the condition and its effects on the whole body—not just the ovaries.
While the name has changed, the condition itself has not. If you’ve previously been diagnosed with PCOS, your diagnosis, treatment and care remain the same.
Why was the name changed?
The term “Polycystic Ovary Syndrome” has long been considered misleading by healthcare professionals.
Firstly, many people with the condition do not have ovarian cysts. The small structures seen on ultrasound are actually immature follicles, not true cysts. Secondly, the name focused primarily on the ovaries, despite the condition affecting multiple hormonal and metabolic systems throughout the body.
The new name aims to better reflect the complexity of the condition while reducing confusion, stigma and delays in diagnosis.
What does PMOS stand for?
Polyendocrine Metabolic Ovarian Syndrome highlights the three major systems involved:
- Polyendocrine – Multiple hormone-producing glands and hormonal pathways are affected.
- Metabolic – The condition is closely linked to insulin resistance, blood sugar regulation and long-term metabolic health.
- Ovarian – The ovaries remain an important part of the condition, particularly regarding ovulation and fertility.
This updated name acknowledges that PMOS is a whole-body endocrine disorder, rather than simply an ovarian condition.
What are the symptoms?
Symptoms remain exactly the same as those previously associated with PCOS and may include:
- Irregular or absent periods
- Difficulty falling pregnant due to irregular ovulation
- Acne
- Excess facial or body hair
- Thinning hair on the scalp
- Weight gain or difficulty managing weight
- Insulin resistance
- Darkened patches of skin
- Fatigue
Not everyone experiences the same symptoms, and they can vary significantly from person to person.
Does the diagnosis change?
No. The diagnostic criteria have not changed.
Healthcare professionals will continue to assess the same combination of symptoms, hormone levels and ovarian findings when diagnosing the condition. Existing diagnoses remain valid, and there is no need to be re-diagnosed simply because the name has changed. A transition period is expected while healthcare systems, guidelines and educational resources adopt the new terminology.
Does treatment change?
Current treatment recommendations remain the same and are tailored to each individual’s symptoms and health goals.
Management may include:
- Regular physical activity
- A balanced, nutritious diet
- Weight management where appropriate
- Medications to regulate menstrual cycles
- Treatments for insulin resistance
- Fertility support if pregnancy is desired
- Management of acne or excess hair growth
Because PMOS affects more than reproductive health, ongoing monitoring of metabolic health, including blood sugar, cholesterol and cardiovascular risk, remains an important part of long-term care.
Looking beyond the name
The transition from PCOS to PMOS is more than a change in terminology. It reflects decades of research showing that this condition affects the endocrine, metabolic and reproductive systems together. Experts hope the new name will improve awareness, encourage earlier diagnosis and promote more comprehensive care for the millions of women living with the condition worldwide.
If you’ve been diagnosed with PCOS, there’s no need to worry—the condition hasn’t changed. What has changed is our understanding of it, and that’s an important step towards better recognition and care.