On May 12, 2026, The Lancet, one of the most respected medical journals in the world, announced that Polycystic Ovary Syndrome (PCOS) is now officially called Polyendocrine Metabolic Ovarian Syndrome (PMOS).
Only one letter has changed. But the new name is far more accurate and far more inclusive of what this condition actually does to your body.
This wasn't a quick decision.
The change was led by Professor Helena Teede of Monash University in Australia and involved experts, healthcare professionals, patient advocates, and medical organizations from around the world. More than 14,000 people participated in surveys and consultations before the new name was agreed upon.
But why does this matter so much?
Because this condition affects roughly 1 in 8 women worldwide, that's over 170 million people. And it affects much more than the ovaries. It affects metabolism, mental health, weight, skin, heart health, and diabetes risk.
Fertility is part of the picture, too, but it's only one part of a much bigger story.
So, why was a condition known by one name for nearly 100 years suddenly renamed? And what does this change actually mean for women living with it today?
In this article, we'll explore:
● Where Did the Name "PCOS" Come From?
● Why the Name Change Actually Matters?
● How did the historic name change happen?
● What does the new name, PMOS, really mean?
By the end of this article, you'll also discover three important questions to ask your doctor at your next appointment, questions that many women don't realise they should be asking.
1. Where Did the Name "PCOS" Come From?
To understand the name change, we have to go back to 1935.
Two doctors, Irving Stein and Michael Leventhal, were treating women with irregular periods and hormone-related symptoms.
During a surgery, they noticed something unusual: the ovaries had many small, cyst-like structures on their surface.
Based on what they saw, they named the condition polycystic ovarian syndrome, "poly" meaning many, "cystic" referring to those cyst-like structures.
But those structures aren't actually cysts. They're follicles, small sacs that contain eggs and are trying (and struggling) to mature and release an egg. In fact, research shows that people with PCOS don't have a higher risk of true ovarian cysts than anyone else.
So for almost 90 years, this condition has carried a name that isn't technically correct.
Because when a name tells only part of the story, it becomes easier to overlook everything else. And that's exactly why changing the name matters.
2. Why the Name Change Actually Matters?
The term "polycystic ovarian syndrome" unintentionally placed the focus almost entirely on the ovaries and fertility.
Many women believed they had ovarian cysts when they actually did not. Others assumed the condition only mattered if they were planning to have children. Even in clinical practice, the name often shifted attention away from the broader health concerns associated with the condition.
In reality, PMOS is a lifelong hormonal and metabolic disorder that can affect multiple aspects of health, including:
● Insulin resistance
● Weight management
● Acne and excess facial or body hair
● Scalp hair thinning
● Mental health, including anxiety and depression
● Increased risk of Type 2 diabetes
● Higher risk of cardiovascular disease
The new name helps reflect this broader understanding and encourages both patients and healthcare providers to look beyond reproductive health alone.
3. How Did This Change Actually Happen?
Changing the name of a globally recognised medical condition is no small task.
This effort began nearly 14 years ago, led by Professor Helena Teede at Monash University. She established an international consortium that eventually included 56 clinical, academic, and patient organisations from across six continents.
More than 14,000 patients and healthcare professionals participated in surveys, with approximately 86% of patients and 71% of clinicians supporting a new name.
The consortium established several guiding principles for selecting a replacement. The new name needed to:
● Reflect current scientific understanding
● Be clear and meaningful for patients
● Reduce confusion and stigma
● Be applicable across different cultures and languages
● Be practical for global healthcare systems
After years of collaboration, discussion, and international consensus, Polyendocrine Metabolic Ovarian Syndrome (PMOS) was officially adopted.
4. What Does PMOS Actually Mean?
Let's break the new name down, letter by letter.
P- Polyendocrine. "Poly" means many, and "endocrine" refers to hormones.
This condition affects multiple hormones in the body, not just one. Androgens, insulin, and anti-Müllerian hormone all interact in complex ways here.
Insulin resistance affects approximately 85% of people with PMOS, including 75% of lean women
M - Metabolic. This is the big addition.
Research has consistently shown that PMOS is closely associated with metabolic health. Many women experience insulin resistance, changes in body weight, altered glucose metabolism, and an increased risk of developing Type 2 diabetes and cardiovascular disease.
Adding "metabolic" makes it clear this is a whole-body, lifelong condition and not just a reproductive one.
O - Ovarian. The ovaries are still very much part of the story, and keeping this word also makes the transition from PCOS to PMOS feel familiar rather than confusing.
S - Syndrome. Meaning it's a collection of signs and symptoms that come together to form a diagnosis.
Although the name has changed, the diagnostic criteria remain the same.
How to Diagnose PCOM?
The actual diagnostic criteria hasn't changed. You still need to have two out of three of the following:
● Irregular or unpredictable periods due to irregular ovulation
● Signs of higher androgens - either on blood tests or symptoms like acne, excess facial or body hair, or scalp hair thinning
● A polycystic ovarian appearance on ultrasound, or elevated anti-Müllerian hormone (AMH)
Now you don't always need to see "polycystic" ovaries to be diagnosed, and the focus is no longer just on reproduction. By naming the “hormonal” and “metabolic” parts of the condition directly, PMOS opens the door to earlier diagnosis, broader treatment options, and more research into the whole condition and not just the ovaries.
So if you're living with this PCOM, here are three simple questions to bring to your next appointment:
1. "Beyond periods and fertility, what should I be monitoring for my long-term health?"
2. "Should I be screened for insulin resistance, diabetes, cholesterol abnormalities, or cardiovascular risk?"
3. "Based on my symptoms, are there additional hormone or metabolic tests that would help guide my treatment?"
These three questions help shift the conversation from just reproductive health to the bigger picture, which is exactly what this name change was designed to do.
This isn't just a rebrand, it's a shift in how the medical world understands and cares for this condition.
If you've been diagnosed with PCOS (now PMOS) or suspect you may have it, our Gynaecologists at Aster RV Hospital can help you look at the complete picture: your hormones, your metabolism, and your long-term health.
If you have questions about PMOS or would like to book a consultation, reach out to our team at Aster RV Hospital.
