From PCOS to PMOS: The Name Change That Could Save Millions of Women From Being Misdiagnosed

Many women diagnosed with PCOS or suspect to have PCOS have trouble recognizing the physical symptoms they experience as part of having this disorder. Questions regarding common symptoms (e.g., “Are there really any cysts? My doctor told me there are no cysts in my ovaries; does it mean I have PCOS? ") are just some of the issues many of these women face regarding what it means to have PCOS.

The primary issue for all these women frequently remains that there has never been a definition of what PCOS is as a syndrome.

A medical consensus has been reached to classify PCOS as a polyendocrine metabolic disorder (PMOS) as of May 2026. While changing the classification of PCOS from PCOS to PMOS may seem like a minor change, it carries very important implications.

So… There Were Never Any Cysts?

Not really, no. This is the part that shocks most people.

The "cysts" commonly associated with polycystic ovary syndrome (PCOS) were never really just cysts. They were originally diagnosed as developing follicles, the tiny, immature sacs containing eggs, which were thought to be "cysts." Therefore, they were misdiagnosed decades ago when polycystic ovary syndrome was first described.

This is further complicated because not everyone with the disorder actually has them. Many women were told they appeared to have normal ovaries and were therefore never diagnosed with PCOS, even if they showed classic signs of PCOS.

In addition, the old name suggested that this was primarily a reproductive issue; that PCOS was related to gynaecological problems; that it was only a concern for women considering becoming pregnant.

Any woman who has had to deal with this condition knows that it's much broader than that.

What PMOS Actually Is

The new name polyendocrine metabolic ovarian syndrome does a much better job of capturing the full picture.

Polyendocrine indicates that the condition is due to hormones and thus affects several of the body's hormone systems. Metabolic indicates that this condition directly affects how a person's body processes insulin, facilitates weight control, and manages how a person's body uses energy.

Yes, there are still ovaries involved in this condition because it's a reproductive health issue, but it is no longer limited to just ovarian problems.

PMOS is an increasingly prevalent issue affecting 1 in 8 women. It can manifest itself with irregular menses, unexplained weight gain, persistent acne, increased scalp hair loss, increased hair growth in other areas, anxiety, depression, and increased risk of type II diabetes.

PMOS affects the entire body, and for many years, women with PMOS were often tossed from specialist to specialist, like gynecologists, dermatologists, and endocrinologists, without connecting the dots and realising that they all had the same problem.

Why a Name Change Actually Matters

You might be thinking: it's just a name, right? Does it really change anything?

It really does. Here's why.

Using a condition's inaccurate name affects different areas, including the training of practitioners in the identification of that condition, who takes responsibility for the diagnosis and treatment of that condition (which specialists), and how researchers design their studies.

Additionally, and perhaps most importantly, it affects how patients describe their own bodies and symptoms to the healthcare system. For example, a woman visits her GP and states that she thinks she has PCOS but does not have any follicles visible on her ultrasound will be told that she in fact does not have PCOS (which will lead to her being told that "there's nothing wrong with her"). As a result, an inaccurate name for a condition has a very different checklist than an accurate name.

The new name for PMOS was not a simple rebranding of PMOS either, but rather it was an 11-year global effort that involved over 22,000 participants (including patients, healthcare providers, researchers, and advocacy groups) from all corners of the planet.

The name was also chosen to reflect the priorities of this community of individuals to seek an accurate name for PMOS, to eliminate the stigma associated with having PMOS, and to indicate that a coordinated whole body approach to the healthcare of individuals with PMOS is required

What This Means for You

The good news is that if you've been diagnosed with PCOS, you still have a correct diagnosis, and nothing is being taken away from you. Rather, consider it like an upgrade. Your condition is still the same; we simply know more about it, and its official name is just beginning to catch up to reality.

From now on, you can expect to see "PMOS" being used increasingly in medical journals, treatment protocols, and ultimately at your next visit to your GP. The Endocrine Society and others have pledged to update their educational programs and classifications globally.

Those of you who have been looking for a name for a problem that has eluded definition until now can take heart that a broader definition may open many doors that were previously closed

The Bigger Picture

Remarkably, 22,000 people spent more than a decade advocating to change the name of a medical disease. This tells us that we know our bodies and are entitled to terms that recognise that.

For many years now, women's ailments have been downplayed, misinterpreted, and, worst of all, named incorrectly. The term PMOS is a clear indication that when patients, scientists, and doctors collaborate, progress can be made even if some aspects of healthcare have remained unchanged for decades.

If you feel you spent years struggling to make sure your medical diagnosis matched what you felt and experienced, this change is for you.