PCOS Has Been Renamed PMOS.
The Name Has Changed. The Condition Has Not. But How You Understand It Should.
More than 170 million women worldwide live with what has, until now, been called polycystic ovary syndrome. It is one of the most common hormonal conditions affecting women of reproductive age, and yet it remains one of the most misunderstood, misdiagnosed and poorly managed conditions in modern medicine.
As of May 2026, that is starting to change. After more than a decade of global consultation involving over 22,000 patients, doctors, researchers and health organisations across the world, polycystic ovary syndrome has been officially renamed. The condition is now called polyendocrine metabolic ovarian syndrome, or PMOS.
The name change was announced at the European Congress of Endocrinology in Prague and published in The Lancet on 12 May 2026. It represents a landmark moment not just in terminology, but in how the medical world understands this condition and, critically, how it is treated.
If you have been living with a PCOS diagnosis, or suspect you might have it, this is an article worth reading carefully.
Why Did the Name Change?
The old name, polycystic ovary syndrome, was always misleading. It reduced a complex, whole-body hormonal and metabolic condition to a description of what the ovaries sometimes look like on an ultrasound scan. The word “polycystic” implied the condition was primarily about cysts on the ovaries. In reality, the so-called “cysts” are not cysts at all. They are immature follicles, small fluid-filled sacs that are a normal part of ovarian function. Many women with PCOS do not even have polycystic-appearing ovaries. And many women who do have polycystic-appearing ovaries do not have the condition.
This created confusion on every level. Women were being told their problem was their ovaries, when in fact the condition involves the endocrine system, the metabolic system, the skin, mental health and cardiovascular risk. Doctors were focusing on the reproductive symptoms and missing the bigger picture entirely. And many women were being left undiagnosed because their presentation did not match the narrow image the old name implied.
The new name, polyendocrine metabolic ovarian syndrome, corrects this. It tells you three critical things about the condition.
Polyendocrine means it involves multiple parts of the hormone system, not just the ovaries. This includes the adrenal glands, the hypothalamic-pituitary axis, insulin signalling and androgen metabolism. The hormonal disruption in PMOS is systemic.
Metabolic acknowledges that insulin resistance, glucose dysregulation, dyslipidaemia and long-term cardiovascular risk are central features of the condition, not secondary side effects. Many women with PMOS are at significantly elevated risk of type 2 diabetes, gestational diabetes, cardiovascular disease and metabolic syndrome, regardless of their body weight.
Ovarian retains the connection to ovarian function and reproductive health, because ovulatory dysfunction, irregular cycles and fertility challenges are core features of the condition for many women.
In the global consultation, 86 per cent of patients and 71 per cent of clinicians supported renaming the condition. The primary reasons cited were reducing stigma, improving scientific accuracy and ensuring the name reflected the full clinical reality of the condition. The rollout of the new name is planned over three years, with updates to clinical guidelines, medical education and disease classification systems in 195 countries.
How Is PMOS Diagnosed?
Diagnosis of PMOS (formerly PCOS) is still based on the Rotterdam Criteria, which require at least two of the following three features to be present.
Irregular or absent periods. This reflects ovulatory dysfunction. If you are not ovulating regularly, your cycles will be irregular, unpredictable or absent altogether.
Elevated androgens. This can be clinical, meaning you have visible symptoms such as excess facial or body hair, acne, or hair thinning. Or it can be biochemical, meaning your blood tests show elevated levels of testosterone or other androgen hormones.
Polycystic-appearing ovaries on ultrasound. This means 12 or more follicles visible on one or both ovaries, or an increased ovarian volume. However, this criterion alone is not enough for a diagnosis, and many experts now consider it the least reliable of the three.
It is important to understand that you do not need all three features for a diagnosis. Two out of three is sufficient. This is one of the reasons so many women are missed. If your doctor is only looking for polycystic ovaries on a scan, they will miss the women who have hormonal and metabolic disruption without the ovarian appearance.
The Blood Tests You Should Be Asking For
If you suspect you have PMOS, or if you have already been diagnosed and want to understand the full picture of what is happening in your body, the following tests are essential. A standard GP blood panel will not cover most of these.
Hormone Panel
Total and free testosterone. Elevated testosterone is one of the most common hormonal findings in PMOS. Free testosterone is often more informative than total testosterone because it reflects the amount of the hormone that is biologically active and available to affect your tissues. Even a small elevation in free testosterone can drive symptoms like acne, facial hair and hair thinning.
Sex hormone binding globulin (SHBG). SHBG is the protein that binds testosterone in the blood and makes it inactive. In women with PMOS, SHBG is frequently low, which means more free testosterone is available to act on the body. Low SHBG is closely linked to insulin resistance and is a useful marker of metabolic health.
Luteinising hormone (LH) and follicle-stimulating hormone (FSH). These two hormones regulate ovulation. In many women with PMOS, LH is elevated relative to FSH. While the LH-to-FSH ratio alone does not diagnose the condition, a ratio above 2:1 is a supportive finding and can help explain why ovulation is not occurring properly. These tests should ideally be done between days two and five of your cycle.
DHEA-S (dehydroepiandrosterone sulphate). This is an androgen produced by the adrenal glands. Elevated DHEA-S suggests that the adrenal glands, not just the ovaries, are contributing to androgen excess. This is relevant because it can change the treatment approach.
Anti-Müllerian hormone (AMH). AMH reflects the number of small follicles in the ovaries. In women with PMOS, AMH is often significantly elevated, which correlates with the degree of ovarian dysfunction. Recent research suggests that the higher the AMH, the more severe the condition and the greater the impact on fertility.
Progesterone. A progesterone test taken on day 21 of your cycle (or seven days after suspected ovulation) can confirm whether you are actually ovulating. In many women with PMOS, progesterone levels remain low throughout the cycle, confirming anovulation.
Metabolic Panel
Fasting insulin. This is arguably the most important and most commonly overlooked test in PMOS assessment. Insulin resistance is present in the majority of women with the condition, including many who have a normal body weight. A fasting glucose test alone will not detect insulin resistance in its early stages. Your blood sugar can remain normal for years while your insulin levels are climbing higher and higher to compensate. By the time your glucose is elevated, the damage has already progressed significantly.
HOMA-IR (Homeostatic Model Assessment for Insulin Resistance). This is calculated from your fasting insulin and fasting glucose levels and provides a more reliable picture of insulin resistance than either test on its own.
HbA1c (glycated haemoglobin). This measures your average blood sugar control over the previous two to three months and is used to screen for prediabetes and type 2 diabetes.
Fasting lipid profile. Women with PMOS are at increased risk of dyslipidaemia, which means elevated triglycerides, elevated LDL cholesterol and reduced HDL cholesterol. A full lipid panel should be part of any thorough PMOS assessment.
Thyroid and Nutritional Status
Thyroid function (TSH, free T4, free T3, thyroid antibodies). Thyroid disorders can cause menstrual irregularity, fatigue, weight changes and mood disturbance, all of which overlap with PMOS symptoms. Ruling out thyroid dysfunction, including subclinical hypothyroidism and autoimmune thyroiditis, is essential.
Ferritin. Ferritin measures your stored iron. Levels below 70 micrograms per litre are associated with increased hair shedding in women, even when standard iron markers appear normal. Many women with PMOS also experience hair thinning, and low ferritin can make this significantly worse.
Vitamin D. Vitamin D deficiency is more common in women with PMOS and has been linked to worsened insulin resistance, mood disturbance and disrupted ovulation.
Vitamin B12 and folate. These are essential for energy metabolism, nervous system function and red blood cell production. Deficiencies are common and often contribute to fatigue and brain fog.
How to Manage PMOS Symptoms
The most important thing to understand about PMOS management is that there is no single treatment that addresses every aspect of the condition. Because it is a multisystem disorder, it requires a multifaceted approach. The most effective strategies combine medical treatment, nutritional support and lifestyle modification.
Insulin Resistance
This is the metabolic driver of the condition for the majority of women. When your cells become resistant to insulin, your pancreas produces more insulin to compensate. Elevated insulin stimulates the ovaries to produce more testosterone, which drives symptoms such as acne, hirsutism and hair loss. It also disrupts ovulation, promotes weight gain (particularly around the midsection) and increases long-term cardiovascular risk.
Addressing insulin resistance is therefore one of the most impactful interventions you can make.
Metformin is the most widely prescribed medication for insulin resistance in PMOS. It reduces the amount of glucose your liver produces and improves your cells’ sensitivity to insulin. For many women, metformin leads to more regular cycles, reduced androgen levels and modest weight loss.
Inositol, specifically myo-inositol and D-chiro-inositol in a 40:1 ratio, has emerged as one of the most evidence-based supplements for PMOS. Inositol acts as a second messenger in insulin signalling and has been shown in multiple clinical trials to improve insulin sensitivity, reduce testosterone levels, restore ovulatory function and improve egg quality.
Androgen Excess
If your symptoms are primarily driven by elevated androgens, your doctor may recommend anti-androgen therapy such as spironolactone, which blocks the effects of testosterone on the skin and hair follicles. This can be particularly effective for persistent acne, facial hair and androgenetic hair loss. It takes several months to see the full effect and is not suitable during pregnancy.
The combined oral contraceptive pill is also commonly prescribed for PMOS. It suppresses ovarian androgen production, raises SHBG (thereby reducing free testosterone), and regulates the menstrual cycle. However, it is important to understand that the pill manages symptoms. It does not treat the underlying condition. When you stop taking it, the symptoms will return if the root causes have not been addressed.
Fertility
For women with PMOS who are trying to conceive, ovulatory dysfunction is the main barrier. Lifestyle modification, particularly weight management and insulin sensitisation, should be the first step. Beyond that, letrozole is now recommended as the first-line ovulation induction agent, having been shown to produce higher ovulation and live birth rates than clomiphene in women with PMOS.
Mental Health
Anxiety, depression and mood instability are significantly more common in women with PMOS. This is not simply a psychological response to the symptoms. There is growing evidence that the hormonal and metabolic disruption of the condition directly affects brain chemistry and emotional regulation. If you are struggling with your mental health, it should be treated as a clinical feature of the condition, not dismissed as something separate.
Lifestyle Changes That Make a Real Difference
Lifestyle modification is recommended as the first-line intervention for PMOS in every major clinical guideline. This is not a polite suggestion. For many women, the right lifestyle changes can be as effective as medication, and in some cases more so.
Diet
There is no single “PMOS diet” that works for everyone. However, the principles that consistently improve insulin sensitivity, hormonal balance and inflammatory markers are clear.
Prioritise low glycaemic index foods. This means choosing carbohydrates that are absorbed slowly and do not cause sharp spikes in blood sugar. Whole grains, legumes, non-starchy vegetables, nuts and seeds are all low GI. White bread, white rice, sugary drinks and processed snacks are high GI. The goal is not to eliminate carbohydrates but to choose ones that keep your blood sugar and insulin response stable.
Increase fibre intake. Fibre slows digestion, improves blood sugar control, supports gut health and helps with satiety. Aim for a variety of sources including vegetables, legumes, whole grains, nuts and seeds.
Include anti-inflammatory foods. Chronic low-grade inflammation is a feature of PMOS. Omega-3 fatty acids (found in oily fish, flaxseed and walnuts), antioxidant-rich fruits and vegetables, and foods such as turmeric and extra virgin olive oil can help modulate the inflammatory response.
Be mindful of dairy and refined sugar. Some women with PMOS find that dairy aggravates their acne and inflammation. Refined sugar drives insulin spikes. Neither needs to be completely eliminated, but reducing your intake and observing how your body responds can be informative.
Eat regular, balanced meals. Skipping meals and prolonged fasting can worsen blood sugar instability in some women with PMOS. Including protein, healthy fats and fibre at each meal helps maintain steady energy and reduces insulin surges.
Exercise
Physical activity is one of the most powerful tools for managing PMOS, and it does not require extreme training.
Both aerobic exercise and resistance training are beneficial. Aerobic exercise (brisk walking, cycling, swimming, dancing) improves cardiovascular fitness and insulin sensitivity. Resistance training (weights, bodyweight exercises, resistance bands) builds muscle mass, which directly improves insulin sensitivity because muscle tissue is one of the primary sites where glucose is taken up from the blood.
Aim for at least 150 minutes of moderate-intensity exercise per week, or 75 minutes of vigorous-intensity exercise. Combining both aerobic and resistance training appears to produce the best outcomes for women with PMOS.
Vigorous exercise has shown particular promise. Research has demonstrated that vigorous aerobic exercise improves body composition, cardiorespiratory fitness and insulin resistance more effectively than moderate exercise alone. This does not mean you need to do high-intensity interval training every day, but incorporating some sessions at a higher intensity can be genuinely beneficial.
Consistency matters more than intensity. The best exercise routine is one you can sustain over the long term. If you are currently inactive, start with what is manageable, walking for 20 minutes a day, for example, and build from there.
Sleep
Poor sleep and clinical sleep disturbance are more common in women with PMOS and are often overlooked in treatment plans. Sleep deprivation worsens insulin resistance, increases cortisol, disrupts appetite-regulating hormones and amplifies mood instability.
Prioritise seven to nine hours of quality sleep. Maintain a consistent sleep schedule. Limit screen exposure before bed. Address any underlying sleep issues such as sleep apnoea, which is more prevalent in women with PMOS than in the general population.
Stress Management
Chronic stress elevates cortisol, which worsens insulin resistance, drives inflammation and disrupts the hormonal environment. It also makes it much harder to maintain the dietary and exercise habits that support your health.
Mindfulness, meditation, yoga, breathing exercises and cognitive behavioural therapy have all been shown to reduce anxiety, depression and stress levels in women with PMOS. These are not luxuries. They are clinical interventions that support the physiological management of the condition.
Supplements Worth Discussing With Your Doctor
Inositol (myo-inositol and D-chiro-inositol, 40:1 ratio) for insulin sensitivity and ovulatory function.
Vitamin D if your levels are deficient, which is common in women with PMOS and associated with worsened metabolic and reproductive outcomes.
Omega-3 fatty acids for their anti-inflammatory effects and potential benefits on lipid profiles.
Magnesium for insulin sensitivity, sleep quality and stress reduction.
Zinc for its role in supporting skin health and reducing inflammation.
Always discuss supplementation with your doctor. Targeted supplementation based on your blood results is significantly more effective than taking generic multivitamins.
The Name Has Changed. Your Approach Should Too.
The renaming of PCOS to PMOS is not cosmetic. It is a statement from the global medical community that this condition has been mischaracterised for decades and that patients deserve better. Better understanding. Better testing. Better treatment.
If you have been living with a PCOS or PMOS diagnosis, now is a good time to revisit your care. Have you had a full metabolic workup including fasting insulin? Has your doctor assessed your cardiovascular risk? Are you being supported with your mental health, your nutrition, your hormonal symptoms and your long-term health, not just your menstrual cycle?
If the answer to any of those questions is no, you are not receiving the level of care this condition requires. And you are entitled to ask for it.
Start With a Proper Assessment
At The Wellness, our approach to PMOS is built around the understanding that this is a whole-body condition that requires a whole-body response.
We begin with comprehensive blood work, covering your full hormonal profile, metabolic markers, nutritional status and thyroid function. From there, we create a personalised management plan that addresses the specific drivers of your symptoms, whether that is insulin resistance, androgen excess, nutritional deficiencies, lifestyle factors or a combination.
Everything we recommend is evidence-based and tailored to you.
If you have been diagnosed with PCOS or PMOS, or if you suspect you might have it, get in touch with our team today.