The condition previously called Polycystic Ovary Syndrome (PCOS) has officially been renamed:
PMOS = Polyendocrine Metabolic Ovarian Syndrome
This change was announced in a major paper in The Lancet (May 12, 2026) and supported by the Endocrine Society.
Why was the name changed?
Doctors and patients felt the old name “PCOS” was misleading.
Problems with the old name:
- Many women with the condition do not actually have ovarian cysts
- The “cysts” seen on scans are usually small immature follicles, not true cysts
- Some women have “polycystic ovaries” on ultrasound but do not have the syndrome
- The old name focused only on the ovaries and fertility, while the condition actually affects:
- hormones
- metabolism
- weight
- skin
- mental health
- long-term heart and diabetes risk
Researchers felt the old name contributed to:
- delayed diagnosis
- misunderstanding
- stigma
- fragmented care
The new name highlights that this is a whole-body hormonal and metabolic condition, not simply an ovarian problem.
What does the new name mean?
Polyendocrine
= involves several hormone systems in the body
Metabolic
= affects weight, insulin resistance, cholesterol, diabetes risk, and heart health
Ovarian
= ovaries are still involved, especially ovulation and fertility
Syndrome
= a condition made up of a group of symptoms and signs
Have the symptoms changed?
No — the symptoms are the same.
Common symptoms include:
- irregular or absent periods
- difficulty getting pregnant
- acne
- excess facial or body hair
- thinning scalp hair
- weight gain or difficulty losing weight
- darkened skin patches
- fatigue
- mood problems or anxiety
Some women mainly have:
- fertility problems
Others mainly have:
- metabolic problems such as insulin resistance or pre-diabetes.
Common signs doctors look for
Doctors may find:
- raised testosterone or other androgen hormones
- acne or excess hair growth
- irregular ovulation
- high BMI or waist circumference
- insulin resistance
- polycystic-appearing ovaries on ultrasound
Long-term risks can include:
- type 2 diabetes
- high blood pressure
- high cholesterol
- sleep apnea
- endometrial cancer risk from infrequent periods
- anxiety and depression.
Has the diagnostic criteria changed?
No — not currently.
The diagnosis still uses the Rotterdam criteria.
A woman usually needs 2 out of these 3 features:
- Irregular or absent ovulation/periods
- Signs or blood tests showing high androgen hormones
- Polycystic ovaries on ultrasound
Other conditions must first be excluded.
So:
- the name has changed
- the diagnostic criteria have NOT changed yet
Has follow-up or treatment changed?
The main treatments are still similar.
Management still focuses on:
- healthy diet and exercise
- weight management if needed
- treating insulin resistance
- controlling periods
- fertility support
- acne and hair treatments
- mental health support
Medicines may include:
- metformin
- hormonal contraception
- fertility medications
- anti-androgen medicines
What HAS changed in follow-up thinking?
Doctors are now being encouraged to monitor PMOS as a lifelong metabolic and hormonal condition, not just a fertility issue.
More attention is now being placed on:
- diabetes screening
- cholesterol and cardiovascular risk
- mental health
- long-term metabolic health
The new name is also expected to improve:
- awareness
- earlier diagnosis
- multidisciplinary care
- research funding.
Key take-home message
The condition itself has not suddenly changed.
What has changed is the understanding of it.
Old view: “An ovary problem with cysts.”
New view:
“A complex hormonal and metabolic condition affecting the whole body.”
The name PMOS aims to better reflect the real nature of the condition and reduce years of confusion and missed diagnoses.
Remember: ALWAYS consult with your GP and/or your gynecologist for your specific treatment options. Every woman is different!
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