Written by Clinical Nutritionist, Holly Moore
A Small Change with a Big Impact: PCOs to PMOS
If you’ve ever sat in a doctor’s office, heard “your ultrasound looks fine,” and walked out feeling like you were somehow making it up, this one’s for you. PCOS is now officially PMOS.
On May 12, 2026, a landmark consensus paper was published in The Lancet officially renaming polycystic ovary syndrome (PCOS) to polyendocrine metabolic ovarian syndrome, or PMOS. The process involved over 22,000 people, including doctors, researchers, patients, and charities, across more than a decade of consultation.
It is the most robust and extensive disease-renaming process in history.
Why the Old Name ‘PCOS’ Was a Problem
Here’s the problem with the old name: it implied cysts. And most women with this condition don’t actually have cysts, but rather they have arrested follicular development, which is a completely different thing.
That one inaccuracy had a ripple effect. Women were told their ultrasound looked fine and sent home. This meant that metabolic and cardiovascular risk got missed.
PCOS was treated as a gynaecological issue when it was never just that.
And this wasn’t a rare experience. Up to 70% of cases remain undiagnosed, and those who were diagnosed waited years, sometimes decades, before they had answers.
The name didn’t just create confusion; it created a system-wide blind spot, and women paid the price.
What Does Polyendocrine Metabolic Ovarian Syndrome (PMOS) Mean?
So what does the new name actually tell us? Quite a lot! Here’s a breakdown:
- Polyendocrine: this is the part that matters most, clinically. Multiple hormones are involved in PMOS. Not just oestrogen and progesterone, we’re talking insulin, androgens, cortisol, and neuroendocrine signalling. This has never been just an ovarian condition, but the name made it sound like one.
- Metabolic: Blood sugar regulation, insulin resistance, increased risk of type 2 diabetes, and cardiovascular health. These aren’t side notes! They’re central to the condition, and they’re lifelong considerations, not just something to worry about if you’re trying to conceive.
- Ovarian: Yes, the ovaries are involved. But they’re only one piece of a much bigger picture.
The shift in language also signals a shift in how this condition should be managed. It needs to be treated as a metabolic and inflammatory condition, not a gynaecological inconvenience.
This is What Being Heard Looks Like
When researchers asked participants what they wanted the new name to achieve, avoiding stigma came first, even above scientific accuracy or ease of communication.
85% of health professionals and 66% of patients said the same thing: the old name caused harm, and we need something better.
Lorna Berry, a PMOS advocate from Australia who was part of the global renaming process, put it perfectly:
“This is about accountability and progress. It is about my daughters, their daughters, and the countless women yet to be born. We deserve clarity, understanding, and equitable healthcare from the very beginning.”
When you consider that PMOS affects one in eight women (many of whom spent years being told their labs were fine), it’s clear that this change was long overdue.
So, What Does This Mean For Your Health?
First, the practical stuff. If you’ve already been diagnosed with PCOS, nothing changes. Your diagnosis still stands; it’s just getting a new name.
The diagnostic criteria stay the same, and the transition to PMOS will roll out across guidelines, medical records, and health systems over the next three years.
What should change (and what we’d argue has always needed to change) is the clinical approach.
At PHC, we have always looked at this condition the way the new name describes it: hormonal, metabolic, inflammatory, and deeply interconnected.
That means investigating:
- Insulin sensitivity and blood sugar regulation, which are often the drivers of androgen excess, irregular cycles, and weight changes
- Androgen metabolism, not just whether testosterone is elevated, but why, and where the bottleneck is
- Inflammation – a significant driver that conventional care frequently overlooks
- Gut health, because how well your body clears hormones depends heavily on gut function
- Mental health, anxiety and depression aren’t side effects of PMOS; they’re part of the clinical picture
The name is new, the approach we’ve always taken is the same.
But for the women who spent years being dismissed, handed a pill, and sent home, this name change is big.
A Note from Us
At Perth Health Collective, we’ve worked with PMOS (and what we previously called PCOS) as a core clinical focus for years. We run pathology, functional hormone testing, investigate the metabolic drivers, and build individualised protocols.
If you’ve had a diagnosis that never felt complete, or symptoms that keep getting dismissed, we’d love to be part of your care team.
Contact us or book a consultation today to get started.
