What is PMOS/PCOS, and why does nobody explain it properly?
PMOS, polyendocrine metabolic ovarian syndrome, is the new name for what was called PCOS until 2026. It is one of the most common hormonal conditions in women, and one of the least understood. Here is what it is, how it shows up, and what actually helps.
women of reproductive age are affected by PMOS, making it one of the most common hormonal conditions worldwide.
of women with PMOS are estimated to be undiagnosed. Many spend years being told their symptoms are "normal".
an ovary problem. PMOS is a whole-body hormonal and metabolic condition that affects weight, skin, energy, mood and fertility.
A hormonal imbalance with a metabolic root
In PMOS, the ovaries produce more androgens ("male" hormones like testosterone) than they should. This disrupts ovulation, which is why periods become irregular or stop altogether. Behind this, in most women, sits insulin resistance: the body needs more and more insulin to manage blood sugar, and high insulin drives the ovaries to make even more androgens. Add chronic inflammation and stress hormones, and you get a cycle that feeds itself.
The old name was misleading: you do not need to have cysts on your ovaries to have PMOS, and having them does not mean you have it. What matters is the hormonal picture, and the good news is that this picture can change.
How PMOS/PCOS shows up
Not every woman has every symptom. Many have two or three and never connect them.
Irregular or missing periods
Cycles longer than 35 days, very unpredictable, or no period for months.
Weight gain
Especially around the belly, and weight that does not respond to "eating less".
Acne
Persistent, often along the jawline and chin, that flares around the cycle.
Hair changes
Thinning hair on the head, more hair on face, chest or belly.
Fatigue and energy crashes
Tired after meals, afternoon slumps, waking up unrefreshed.
Cravings and food noise
Constant hunger, sugar cravings, feeling out of control around food.
Mood swings and anxiety
Irritability, low mood and anxiety that track with blood sugar and hormones.
Trouble getting pregnant
Because ovulation happens rarely or not at all. This is often reversible.
Four drivers behind the symptoms
Insulin resistance
The most common driver. High insulin pushes the ovaries to produce more androgens and makes the body store fat.
High androgens
Testosterone and similar hormones cause acne, hair changes and block ovulation.
Inflammation
Low-grade chronic inflammation worsens insulin resistance and hormone production.
Stress and cortisol
Under-eating, over-training and poor sleep raise cortisol, which disrupts the whole system.
How PMOS/PCOS is diagnosed
Doctors usually use the Rotterdam criteria: two of the following three are enough for a diagnosis.
Irregular or absent ovulation
Cycles that are long, unpredictable or missing, which points to ovulation not happening regularly.
Signs of high androgens
Either in blood work (testosterone, DHEA-S) or visible as acne, hair loss or excess hair.
Polycystic ovaries on ultrasound
Many small follicles on the ovaries. Optional: you can have PMOS without them.
Other conditions with similar symptoms, such as thyroid issues or high prolactin, should be ruled out first. If you suspect PMOS, ask your doctor for a full hormone panel, not just an ultrasound.
PMOS/PCOS can be managed, without extremes
There is no cure, but the symptoms are highly responsive to how you eat, move and rest. The approach that works is the opposite of what most women try first: more nourishment, not less.
Start now- Balance blood sugar with protein, fibre and healthy fats at every meal, instead of cutting calories.
- Strength training and walking over excessive cardio, which raises cortisol.
- Sleep, stress management and a regular daily rhythm, because cortisol drives androgens.
- Targeted supplements where they make sense, for example inositol, magnesium, omega-3 and vitamin D, ideally checked with blood work.
- Consistency over intensity. Hormones change over months, not days.
Questions women ask me most
Is PMOS the same as PCOS?+
Yes. In May 2026, polycystic ovary syndrome (PCOS) was officially renamed polyendocrine metabolic ovarian syndrome (PMOS) by a global consensus of medical and patient organisations. The old name was misleading: the condition is about hormones and metabolism, not cysts. Both names describe the same diagnosis, and you will still see PCOS used during the transition.
Can PMOS go away?+
PMOS is considered a lifelong condition, but the symptoms can go into remission. Many women get regular periods, clear skin and a stable weight back once insulin, inflammation and stress are addressed.
Do I have to lose weight to fix my PMOS?+
No. Restriction often makes PMOS worse because it raises cortisol and disrupts ovulation further. Weight usually normalises as a result of balancing hormones, not as a prerequisite.
Can I get pregnant with PMOS?+
Yes. PMOS is one of the most common causes of ovulation-related fertility issues, and also one of the most treatable. Once you ovulate regularly again, your chances are similar to women without PMOS.
Does the pill treat PMOS?+
The pill can mask symptoms like acne and irregular bleeding, but it does not treat the underlying insulin resistance or androgen excess. Many women only discover their PMOS after coming off it.
What is the best diet for PMOS?+
There is no single PMOS diet. What works is a blood-sugar friendly way of eating: enough protein, fibre and healthy fats, regular meals, and no extreme restriction. My free meal plan in the blog is a good place to start.
Ready to finally understand your body?
Three ways to start: 1:1 coaching, the HEAL Program, or my self-guided guides.
Start nowThis page is for information only and does not replace medical advice. If you suspect PMOS, please speak to your doctor or gynaecologist.