What PMOS is
PMOS is the new name for the condition long known as PCOS (polycystic ovary syndrome). In May 2026 an international consensus, published in The Lancet, renamed it polyendocrine metabolic ovarian syndrome. The new name reflects what people living with it already knew: this is a whole-body hormonal and metabolic condition, not just an ovary problem. Many people, and many clinicians, still use “PCOS”, so you’ll see both for a while.
It’s one of the most common hormonal conditions in people of reproductive age, affecting roughly 1 in 10. The World Health Organization estimates that up to 70% of people with it haven’t been diagnosed.
Common signs and symptoms
PMOS looks different from person to person. You may have some of these and not others:
- Irregular, infrequent or absent periods, or very long cycles
- Trouble ovulating, which can make getting pregnant harder
- Acne, especially along the jaw, that doesn’t respond to the usual treatments
- Extra hair growth on the face, chest or belly, or thinning hair on the scalp
- Weight gain, or weight that’s hard to shift despite real effort
- Fatigue, sugar cravings and energy crashes
- Mood changes, anxiety or low mood
- Darkened, velvety skin in body folds (acanthosis nigricans), a sign of insulin resistance
It’s not in your head, and it’s not laziness. Exhaustion and weight changes in PMOS have real hormonal and metabolic causes. They make ordinary things genuinely harder.
How it’s diagnosed
In adults, diagnosis usually follows international criteria: having at least two of the three below, after other causes have been ruled out.
- Irregular or absent ovulation, often shown by irregular cycles
- Signs of higher androgens (“male-type” hormones), seen in symptoms like acne and hair growth or in blood tests
- Polycystic ovaries on ultrasound, or, under the 2023 international guideline, a high AMH blood level as an alternative in adults
Your provider should also check for conditions that can look similar, like thyroid problems or high prolactin.
Questions worth raising about tests
Every person’s situation is different, so treat this as a conversation starter with your provider, not a shopping list:
- Which hormones were tested, and on which day of my cycle? Some results mean little if taken at the wrong time.
- Have my androgens been checked (for example total and free testosterone and SHBG)?
- Has my blood sugar and insulin response been looked at, such as fasting glucose, HbA1c or an oral glucose tolerance test?
- Have thyroid (TSH) and prolactin been checked to rule out other causes?
- Can you show me the actual numbers, not just “normal”? A result at the edge of the range is a different conversation from one in the middle.
Our appointment toolkit has a printable checklist for this.
What drives symptoms
PMOS doesn’t have one single cause, and that’s why one-size-fits-all advice so often fails. Several drivers tend to overlap, in different proportions for different people:
Insulin resistance
When cells respond less to insulin, the body makes more of it. High insulin can push the ovaries to produce more androgens, feeding acne, hair changes and irregular cycles.
Stress and cortisol
Chronic stress and a disrupted cortisol rhythm affect blood sugar, sleep and the signals that regulate ovulation.
Inflammation
Low-grade chronic inflammation is common in PMOS and is linked to insulin resistance and androgen production.
Genetics, nutrient deficiencies, sleep and other conditions also play a role. Understanding which drivers matter most for you is often what makes support finally work.
Care and support options
There’s no cure, but symptoms can improve a lot. Options are often combined:
- Lifestyle foundations: balanced meals with protein and fibre to steady blood sugar, strength training, sleep and stress support. The international guideline recommends these as a first step for many people, without strict diets.
- Medications: such as hormonal contraception for cycle regulation and skin, metformin for insulin resistance, anti-androgens, or ovulation induction for fertility. Your doctor can explain the trade-offs.
- Long-term health: PMOS is linked to higher risk of type 2 diabetes, heart disease, sleep apnea and endometrial changes if periods are very infrequent, so regular check-ins matter.
- Mental health: anxiety, depression and disordered eating are more common with PMOS. Screening and support should be part of care.
Want to know what’s driving your symptoms?
Mimi, our Director of Education, lives with PMOS and is a Licensed Holistic Nutrition Practitioner. Her free 3-minute quiz helps you see which drivers may be at play, so you know where to start.
Nutristica is Mimi’s independent practice. It complements, and doesn’t replace, care from your doctor.
Common questions
Is PMOS the same as PCOS?
Yes. PMOS (polyendocrine metabolic ovarian syndrome) is the new name for PCOS, adopted through an international consensus published in May 2026. The condition is the same; the name better reflects its hormonal and metabolic nature.
Can you get pregnant with PMOS?
Many people with PMOS do get pregnant, sometimes with support to help ovulation. It can take longer, and a fertility conversation with your doctor is worthwhile if you’re planning or have been trying for a while.
Do I have to cut out carbs?
No. The type of carbohydrate and what you pair it with matter more than cutting carbs out. Slower carbs like oats, lentils and whole grains, eaten with protein, fat and fibre, tend to keep blood sugar steadier. Highly restrictive diets are hard to sustain and can backfire.
Do you need cysts on your ovaries to have PMOS?
No. Despite the old name, you can be diagnosed without polycystic ovaries on ultrasound if you meet the other criteria.
Last updated October 2026. Written by The Cuterus Corner team from lived experience and published research. Clinical review by our professional network is in progress; professionals can join as reviewers. This guide is educational and doesn’t replace advice from your healthcare provider.