What the Renaming of PCOS Means for You

— International PCOS Network, The Lancet, May 2026

PCOS — polycystic ovary syndrome — has long been one of the most common hormonal conditions affecting women of reproductive age. It affects around 1 in 8 women.

That’s partly because the symptoms are so varied. Some women have irregular or absent periods. Others have acne that won’t respond to treatment, or unwanted facial and body hair. Some struggle with weight changes that don’t seem to respond to diet or exercise. Others experience fatigue, mood difficulties, or fertility problems. Many have a combination of all of these.

This is exactly the problem the new name hopes to fix.

On 12 May 2026, following a 14-year global process involving 56 professional societies and more than 22,000 patients and clinicians worldwide, PCOS was officially renamed. It is now called:

Polyendocrine Metabolic Ovarian Syndrome — PMOS

That might sound like a mouthful. But each word is doing important work.

Polyendocrine means it affects multiple hormone systems — not just the ovaries, but insulin, androgens (male-type hormones present in all of us), and the pathways connecting your brain, metabolism, and reproductive system.

Metabolic that this condition affects how your body processes energy, sugar, and fat. Insulin resistance is common in PMOS, even in women who aren’t overweight — raising the risk of type 2 diabetes, cardiovascular disease, and other long-term health conditions if it goes unrecognised.

Ovarian stays in the name because the ovaries are involved — but they are no longer the whole story.

The word “polycystic” sent both patients and doctors looking for cysts. When cysts weren’t visible on a scan, the picture became unclear. Symptoms that should have pointed to a hormonal and metabolic picture — acne, hair growth, fatigue, depression, difficulty losing weight — were sometimes treated in isolation, rather than as part of a connected whole.

The new name clears that up.

PMOS is fundamentally a female hormonal health condition, and it deserves to be understood in that context. It can affect fertility, menstrual regularity, and pregnancy — but it also reaches far beyond reproduction. The metabolic features of PMOS mean that long-term risks to heart health, bone health, and mental wellbeing all deserve attention across a woman’s lifetime, not just during the reproductive years.

This is why women’s health expertise matters so much in managing PMOS well. If you have been diagnosed — or think you might be — a conversation with a GP with a special interest in women’s health is the best place to start. They can look at the full picture: hormones, metabolism, mental health, and what matters most to you at this stage of your life.

If you already have a PCOS diagnosis, nothing changes urgently. Your diagnosis still stands and your treatment remains the same. But this rename should open the door to conversations that were harder before — about your metabolism, your cardiovascular risk, your mental health, and not just your cycle.

The diagnostic criteria remain the same, but the framing has shifted — and that matters enormously in how clinicians think and what they look for.

Treatment for PMOS is personal — what you need depends on what’s troubling you most right now. Your GP will want to understand your priorities: is it your periods, your skin, your weight, your mood, or your fertility? The answer shapes where you start.

•       For irregular periods or skin and hair concerns (such as acne or unwanted hair growth), a combined oral contraceptive pill is usually the first medical option your GP will consider. There are different formulations, and your GP can help you choose the one that suits you based on your health history.

•       For metabolic concerns — including difficulty managing weight or blood sugar — your GP may discuss metformin, a medication commonly used in diabetes that also helps with insulin resistance in PMOS. It is well-established in women’s health practice.

•       For fertility, if you are trying to conceive and not having regular cycles, your GP is a great first point of contact — but fertility treatment itself is managed through a specialist fertility clinic, who can offer a full range of options tailored to your situation.

•       For mental health, anxiety and depression are significantly more common in women with PMOS — this is part of the condition, not a separate problem. Current guidelines recommend that emotional wellbeing is assessed at diagnosis and revisited over time.

Lifestyle intervention is recommended for every woman with PMOS — regardless of weight — and the evidence behind it is strong.

What to eat

The research points clearly towards an anti-inflammatory, blood sugar-friendly eating pattern. Two dietary approaches have the strongest evidence in PMOS:

The DASH diet (Dietary Approaches to Stop Hypertension) has the most robust evidence — a 2024 network meta-analysis of 19 randomised controlled trials found it ranked highest for improving insulin resistance and blood glucose levels. It focuses on vegetables, fruits, whole grains, lean protein, low-fat dairy, nuts, and legumes, with limited red meat and refined carbohydrates.

The Mediterranean diet performs almost as well, and for many people feels more intuitive. It centres on olive oil, oily fish, vegetables, legumes, wholegrains, and seasonal produce — and has the benefit of being genuinely pleasurable to follow long-term.

The key principle underlying both is managing blood sugar and reducing insulin spikes. In practice this means:

•       Choosing wholegrains over refined carbohydrates

•       Including protein with every meal to slow glucose absorption

•       Eating plenty of fibre-rich vegetables and legumes

•       Minimising ultra-processed foods, sugary drinks, and refined snacks

No single diet suits everyone. The best eating pattern is one you enjoy and can sustain.

How to move

Exercise is one of the most powerful tools available for PMOS — and you don’t need to be doing hours in a gym for it to count.

Current evidence supports a combination of aerobic exercise (such as brisk walking, swimming, or cycling) and resistance or strength training (such as weights, resistance bands, or bodyweight exercises). Both improve insulin sensitivity, and resistance training has particular benefits for androgen levels and body composition.

Current guidelines recommend at least 150 minutes of moderate aerobic activity per week, alongside strength training on at least two days. But perhaps more importantly, research shows that reducing time spent sitting can have a meaningful impact on insulin levels — even without formal exercise sessions.

This is where exercise snacks come in. An exercise snack is simply a short burst of movement — as little as 2–5 minutes — taken regularly throughout the day. This might be:

•       A brisk walk around the block after lunch

•       A set of squats or stair climbs before a meeting

•       A few minutes of movement every hour at your desk

Studies show that breaking up prolonged sitting with these brief activity bursts can meaningfully reduce post-meal blood sugar and insulin levels — making them particularly relevant for PMOS. The message is simple: more movement, less sitting, in whatever form works for you.

If you think you may have PMOS, or have questions about your existing diagnosis, speak to your GP or ask to see a GP with a special interest in women’s health. They can help you understand your full picture and explore what support — medical and lifestyle — is right for you.