You might have seen the news: PCOS has been officially renamed. The condition affecting 1 in 8 women of reproductive age is now called polyendocrine metabolic ovarian syndrome (PMOS) for short.
If you have a PCOS diagnosis, or you’ve been wondering whether you might, it’s reasonable to feel unsure about what this means. Does it change your diagnosis? Your treatment? What you should do next?
It doesn’t change much in practice. What it does change is the conversation, and for many women, that matters.
What is Polyendocrine Metabolic Ovarian Syndrome (PMOS)?
PMOS (polyendocrine metabolic ovarian syndrome) is the new official name for what was previously called PCOS. The condition is the same. The name has changed to more accurately reflect what it actually is.
The change was published in The Lancet on 12 May 2026, following a 14-year process led by researchers at Monash University. More than 22,000 patients and health professionals across six continents contributed. Fifty-six major clinical and patient organisations, including the Endocrine Society and Verity (PCOS UK), endorsed it.
This wasn’t a quick rebranding exercise. It was a long, careful attempt to give an often misunderstood condition a name that actually fits.
Why did the name need to change?
The old name created a problem that followed women into consulting rooms for decades.
‘Polycystic ovary syndrome’ implied the condition is defined by cysts on the ovaries. But those ‘cysts’ aren’t pathological cysts at all. They are arrested follicles, eggs that started developing but didn’t reach maturity. And many women with the condition don’t have any visible on scan at all.
The result was predictable. Women who didn’t fit the cysts-on-ovaries picture were told it probably wasn’t PCOS. An estimated 70% of people with the condition remain undiagnosed. That’s not a coincidence. It’s a naming problem.
Beyond diagnosis, the name shaped how the condition was treated. Framing it as primarily an ovarian issue meant the wider picture got missed:
- Metabolic and cardiovascular risks were regularly overlooked
- Mental health impacts weren’t consistently recognised
- Research funding flowed too narrowly toward reproductive aspects
- Women who weren’t trying to conceive felt the condition was only ever discussed in fertility terms
What does the name Polyendocrine Metabolic Ovarian Syndrome actually mean?
Each part of the new name was chosen to reflect something the old name obscured.
Polyendocrine: multiple hormones, not multiple cysts
The ‘poly’ now refers to the several interacting hormonal disturbances involved, including androgens like testosterone, insulin, and neuroendocrine hormones. PMOS is a hormonal condition. The ovaries are affected by it, but they’re not where it begins.
Metabolic: the part that was hiding in plain sight
This is the most significant addition. PMOS formally acknowledges the metabolic dimension of the condition, including insulin resistance, blood sugar regulation, weight, and long-term cardiovascular risk. For many women, these are the symptoms that affect daily life most. The new name treats them as central, not incidental.
Ovarian: reproductive health is still part of the picture
Keeping ‘ovarian’ in the name means the reproductive and fertility aspects aren’t erased. They’re simply no longer the whole story. For women whose primary concern is their cycle, their fertility, or their hormones, that dimension is still fully recognised.
Syndrome: it looks different for everyone
PMOS is still a syndrome, a cluster of features that can present very differently from one person to the next. There’s no single picture. Some people experience significant metabolic symptoms with few reproductive ones. For others it’s the reverse. Your experience is what it is, regardless of where it sits on the spectrum.
What does this mean for your fertility?
Before we talk about treatment, it’s worth separating what changes from what doesn’t.
What doesn’t change: the diagnostic criteria, the clinical evidence, and the treatment protocols. If you have a PCOS diagnosis and are in or considering fertility treatment, your pathway remains exactly the same. The science behind how PMOS affects ovulation, egg development and implantation is unchanged.
What may change over time is the way care is framed. Because PMOS is now formally understood as a metabolic condition as well as a reproductive one, there’s growing recognition that looking upstream, at insulin levels, metabolic health, and hormonal drivers, is important before and during fertility treatment, not just after other approaches haven’t worked.
At Create Fertility, this is how we’ve approached PCOS care for years. Before we talk about stimulation or treatment protocols, we look at what your fertility picture actually looks like: your hormone levels, your ovarian reserve, and the metabolic factors that might be shaping your cycle. That doesn’t change with the new name. It’s just now better reflected in the language.
For women with PMOS, we often use Mild IVF protocols, lower doses of stimulating drugs over a shorter period. This is because women with PMOS can sometimes over-respond to conventional stimulation, which carries risk. Mild protocols reduce that risk while still giving a good chance of collecting viable eggs. What’s right for you depends on what we find when we look at your individual picture.
What are the symptoms of PMOS?
The symptoms are the same as PCOS, because the condition is unchanged. But the new name helps explain why the picture can feel so varied, and why symptoms that seem unrelated often aren’t:
- Irregular or absent periods
- Difficulty conceiving
- Insulin resistance or difficulty regulating blood sugar
- Weight changes, particularly around the abdomen
- Acne or oily skin
- Excess facial or body hair
- Hair thinning
- Fatigue
- Low mood or anxiety
- Elevated androgens (testosterone, DHEA-S)
Not everyone has all of these. Some people have several; others have one or two that are significant. There’s no single version of PMOS, and you don’t need to match a particular profile to take your symptoms seriously.
Does my existing PCOS diagnosis change?
No. Your diagnosis is completely valid and carries across. You don’t need to be re-referred or re-tested.
Over the next three years, you’ll likely see both ‘PCOS’ and ‘PMOS’ appearing in medical records, test results and letters as the medical world transitions. The name will be formally updated in the International Classification of Diseases (ICD) in 2028. Until then, both terms refer to the same condition.
What if you’re not sure whether you have PMOS?
This is where the name change may actually make a difference.
If you’ve had irregular periods, signs of insulin resistance, or symptoms like acne or hair thinning, and you’ve been told it probably wasn’t PCOS because no cysts showed up on scan, it’s worth revisiting that.
The condition has never required visible cysts to be present. What it requires is a pattern of symptoms and hormonal markers. Ultrasound is one part of the picture, but blood tests, looking at androgens, insulin, AMH and other markers, often tell us more.
You don’t need to have it all figured out before you speak to someone. Understanding where things stand is the starting point, not the end of it.
From the Create Health team
We’ve been caring for women with PCOS, now PMOS, for years here at Create Health. The name change reflects something we’ve long understood in clinic: that this is a whole-person condition, and that fertility is one part of a much larger picture. If you’re not sure what your PMOS diagnosis means for you right now, or where to start, we’re here to help you get a clearer picture.
Get in touch to have a conversation
Your questions answered
Is PCOS the same as PMOS?
Yes, same condition, new name. Your diagnosis, your test results, and your care plan all carry across.
When did the change become official?
12 May 2026, when the paper was published in The Lancet. Both names will be in use for the next three years, with full ICD reclassification in 2028.
Does this change my treatment at Create Health?
No. Diagnostic criteria and treatment protocols are unchanged. If you’re in treatment or have an existing diagnosis, nothing changes as a result of this announcement.
Can you get pregnant if you have PMOS?
Many women with PMOS conceive, naturally or with fertility support. PMOS can disrupt ovulation, which is often the central fertility challenge. What affects your individual picture depends on your hormone levels, ovarian reserve, and other factors, which is what we look at when we work with you.
I was told it probably wasn’t PCOS because I don’t have cysts. Should I ask again?
It may be worth revisiting. The presence of visible follicles on scan is one indicator, not a requirement. A fuller blood panel, looking at androgens, insulin and AMH, can give a clearer picture. If your symptoms have been unexplained, that’s a reasonable conversation to have with your GP or a specialist.
Do I need to do anything right now?
Not necessarily. If you’re already in care, nothing changes. If you’ve been wondering whether PMOS might be relevant to you, whether because of fertility, cycle irregularity, or other symptoms, understanding where things stand is a sensible first step. You don’t need to decide anything today.
Sources
Time. The Condition Known as PCOS Has a New Name. Time, 12 May 2026.
Teede HJ, Khomami MB, Morman R, et al. Polyendocrine metabolic ovarian syndrome, the new name for polycystic ovary syndrome: a multistep global consensus process. The Lancet. Published online 12 May 2026. DOI: 10.1016/S0140-6736(26)00717-8.
Endocrine Society. Polyendocrine Metabolic Ovarian Syndrome: new name to improve diagnosis and care of condition affecting 170 million women worldwide. Endocrine Society News Release, 12 May 2026.
