If you have recently heard that PCOS has been renamed PMOS, you are probably wondering whether anything about your diagnosis or treatment has changed. It has not. The new name reflects a far better understanding of what this common condition actually involves, particularly the role that insulin resistance and metabolic health play in it.
The change was confirmed in May this year, through a global consensus of leading medical and patient organisations, published in the medical journal The Lancet. The condition it describes affects somewhere between one in ten and one in eight women of reproductive age, which makes it one of the most common hormonal conditions in women, both here in South Africa and worldwide.
What has actually changed
The condition itself has not changed at all. Only the name has. Polycystic Ovary Syndrome (PCOS) is now formally known as Polyendocrine Metabolic Ovarian Syndrome (PMOS).
It is worth being reassured on one point straight away. If you have already been diagnosed and are being treated, nothing about your care needs to change because of the new name. Your symptoms, your treatment, and your relationship with your doctor all stay exactly as they are. The rename is about improving understanding, and it will take time to filter into everyday use.
Why the old name was misleading
The old name focused almost entirely on the ovaries and on cysts, which only told part of the story, and in some cases the wrong part.
Many women with the condition never actually develop true ovarian cysts, which made the old name confusing and a source of unnecessary anxiety. More importantly, it drew attention away from the bigger picture. This is not simply a reproductive problem. It involves several hormone systems and, very commonly, the way the body handles insulin and blood sugar. Naming it purely around ovarian cysts encouraged everyone to look in one place, when the condition deserves a much wider view.
What the new name tells us
The new name breaks down into three parts, each doing a job.
- Polyendocrine points to the fact that multiple hormone systems are involved, not just reproductive hormones.
- Metabolic recognises the strong link to insulin resistance, weight, blood sugar, and long-term risks such as type two diabetes and heart concerns.
- Ovarian keeps the connection to the reproductive and ovulation-related symptoms that remain central to the condition.
That metabolic piece matters enormously, and it is the part the old name hid. Understanding the metabolic side of your health is central to managing PMOS well over the long term, rather than treating it as a purely gynaecological issue.
What this means for you
Symptoms vary widely from woman to woman, but can include irregular or absent periods, acne, excess facial or body hair, difficulty losing weight, thinning hair, and fertility challenges. Doctors still diagnose the condition using the same internationally recognised criteria used before, so the diagnostic process itself has not changed. A diagnosis is usually made when at least two of three features are present: irregular periods, signs of raised male-type hormones, and ovarian changes on an ultrasound.
What the new name encourages is a more complete approach going forward. Expect a stronger focus on metabolic health, which often means screening blood tests to check blood sugar, cholesterol, and related markers, alongside the management of periods, fertility, and skin symptoms.
While medication has an important role for some women, everyday habits matter just as much. Good nutrition, regular movement, quality sleep, and weight management remain some of the most effective ways to improve insulin resistance and ease symptoms over time. If fertility is a concern, it is also worth knowing that a great deal of misinformation exists around reproductive health, and a proper assessment is always more useful than guesswork.
When to speak to your GP
If you have irregular or absent periods, unexplained weight changes, persistent acne or unwanted hair growth, or a family history of the condition, it is worth having a conversation with your doctor. PMOS is common, very manageable, and far easier to stay ahead of when it is identified early.
If you have been living with PCOS, or you have heard about PMOS and are not sure what it means for you, our GPs at Take Care Clinic in Lonehill, Johannesburg can help you understand your symptoms, check your metabolic health, and put together a management plan that suits you. Feel free to book a consultation to talk it through.
Frequently asked questions
Is PMOS different from PCOS?
No. PMOS is the new name for the same condition. Diagnosis and treatment stay the same. The updated name simply reflects that the condition affects hormones and metabolism, not just the ovaries.
Why was PCOS renamed?
Medical experts agreed the old name was misleading, because many women with the condition do not have ovarian cysts, while insulin resistance and metabolic health play a far bigger role than the previous name suggested.
Will my treatment change?
Not because of the name. Your GP will continue treating your symptoms and your underlying metabolic health using the same evidence-based approach as before.
Can PMOS affect fertility?
It can. PMOS may interfere with ovulation, which can make conception more difficult for some women. Many women with the condition still conceive naturally or with appropriate medical support.