If You’ve Been Searching for Answers, This Article Is for You
Irregular periods. Acne that won’t respond to treatment. Difficulty losing weight. Hair growing where you don’t want it, and thinning where you do. Months of trying to conceive without success.
If any of these sound familiar, you may have heard the term PCOS — polycystic ovary syndrome. As of May 2026, that condition has been officially renamed PMOS: polyendocrine metabolic ovarian syndrome.
The name has changed. The condition hasn’t. And if you’re still searching for answers about your symptoms, this article will help you understand what PMOS looks like, how it’s diagnosed, and what it means if you receive — or already have — this diagnosis.
Why PMOS Looks Different in Different Women
One of the most important things to understand about PMOS is that it does not look the same in every woman.
PMOS is a syndrome — a cluster of related symptoms and features that can appear in different combinations. Some women have predominantly hormonal features. Others have more metabolic features. Many have a mix. Some women have only mild manifestations; others experience significant effects across multiple body systems.
This variability is one reason why PMOS has historically been so difficult to diagnose — and why up to 70% of women with the condition are believed to have gone without a diagnosis.
Understanding the full spectrum of PMOS symptoms can help you recognise whether this condition might be relevant to you, and advocate effectively for appropriate testing.
The Full Spectrum of PMOS Symptoms
Menstrual and Ovulatory Symptoms
Disrupted ovulation is at the core of PMOS. This can present as:
- Irregular menstrual cycles — periods that arrive unpredictably, sometimes weeks apart, sometimes months apart
- Infrequent periods — fewer than 8 periods per year is considered clinically significant
- Absent periods (amenorrhoea) — some women with PMOS have very infrequent or no periods
- Anovulatory cycles — having a period but not ovulating in that cycle (more common than many women realise)
- Difficulty timing ovulation — even when ovulation is occurring, it may be hard to predict
Hormonal and Dermatological Symptoms
Elevated androgens (male-type hormones present in all women, but at higher levels in PMOS) can cause:
- Acne — particularly on the lower face, jaw, and chin; often cystic in nature and resistant to standard skincare
- Hirsutism — excess hair growth on the face, chin, upper lip, chest, stomach, or inner thighs
- Alopecia — hair thinning or loss on the scalp, particularly at the crown or temples, following a pattern similar to male-pattern baldness
- Oily skin — related to androgen-driven changes in sebum production
Metabolic Symptoms
PMOS is fundamentally a metabolic condition. Metabolic symptoms are often overlooked but are critically important for long-term health:
- Difficulty losing weight — particularly around the abdomen, which is characteristic of insulin resistance
- Weight gain that seems disproportionate to diet and exercise
- Fatigue — especially after meals, which can indicate blood sugar regulation issues
- Sugar cravings
- Elevated fasting blood sugar or impaired glucose tolerance
- High cholesterol or triglycerides
- High blood pressure in some cases
It is important to note that metabolic symptoms are NOT limited to women who are overweight. Insulin resistance is present in approximately 75% of lean women with PMOS — making it incorrect to assume that a slender woman cannot have significant metabolic features of this condition.
Psychological Symptoms
The psychological impact of PMOS is well-documented and often underappreciated:
- Anxiety — significantly more common in women with PMOS than in the general population
- Depression — also elevated, and may be related both to hormonal factors and the psychological burden of living with a chronic condition
- Poor quality of life — related to a combination of physical symptoms, fertility concerns, and body image challenges
- Eating disorders — some evidence suggests a modestly elevated risk
Psychological wellbeing is a legitimate and important dimension of PMOS care. If you are struggling emotionally, please do not hesitate to seek support.
Fertility Symptoms
- Difficulty conceiving — due to irregular or absent ovulation
- Extended time to pregnancy
- Recurrent pregnancy loss — in some cases
How Is PMOS Diagnosed?
The diagnostic criteria for PMOS are the same as those previously used for PCOS — they have not changed as a result of the renaming.
According to international evidence-based guidelines, an adult woman (aged 20 and over) is diagnosed with PMOS when she meets at least two of the following three criteria, after other conditions have been excluded:
Criterion 1: Oligo-anovulation
This refers to irregular or absent ovulation, typically reflected in irregular menstrual cycles (fewer than 8 cycles per year, or cycle length consistently greater than 35 days or less than 21 days).
It is worth noting that a woman can have regular-appearing periods and still not be ovulating in every cycle. If there is any question about whether ovulation is occurring, a blood progesterone test or ultrasound monitoring may be recommended.
Criterion 2: Clinical or Biochemical Hyperandrogenism
This means evidence of elevated androgens, either:
- Clinical — visible signs such as acne, hirsutism (excess hair), or alopecia (scalp hair loss)
- Biochemical — elevated androgen levels on blood testing (testosterone, free androgen index, or related markers)
Important: not all women with PMOS have obvious signs of hyperandrogenism. Some women have borderline clinical signs, and blood testing is more reliable in these cases.
Criterion 3: Polycystic Ovarian Morphology or Elevated AMH
This criterion can be met by either:
- Polycystic ovarian morphology on ultrasound — the appearance of multiple small follicles (12 or more follicles measuring 2–9mm per ovary) and/or increased ovarian volume
- Elevated AMH (Anti-Müllerian Hormone) — a blood test that reflects the number of developing follicles; elevated AMH has been added to international guidelines as an alternative to ultrasound in adults
Note: the name ‘polycystic’ refers to the appearance of multiple small follicles, not pathological cysts. This is one of the key reasons the name change was necessary — the old terminology implied something that simply isn’t there.
What the Diagnosis Process Looks Like
A thorough PMOS assessment typically involves:
- Detailed medical and menstrual history
- Physical examination (including assessment for signs of hyperandrogenism)
- Blood tests: including total and free testosterone, LH, FSH, AMH, fasting insulin and glucose (or a glucose tolerance test), thyroid function, and prolactin (to exclude other conditions)
- Pelvic ultrasound: to assess ovarian morphology and uterine health
Your doctor will also want to exclude other conditions that can mimic PMOS, including thyroid disorders, elevated prolactin, congenital adrenal hyperplasia, and Cushing’s syndrome.
For Adolescents: Diagnosis Is Different
In adolescents (aged 10–19), PMOS is diagnosed differently. Both of the following must be present:
- Oligo-anovulation (irregular cycles are common in early puberty, so this criterion is applied carefully)
- Clinical or biochemical hyperandrogenism
Ultrasound and AMH are not used as diagnostic criteria in adolescents, because polycystic ovarian morphology is common in this age group and does not necessarily indicate PMOS.
What Happens After Diagnosis?
Receiving a PMOS diagnosis can feel overwhelming — particularly when the condition has many dimensions and there is no single straightforward treatment.
Here is what an evidence-based management approach looks like:
- Comprehensive metabolic assessment — including glucose tolerance, lipid profile, and blood pressure
- Discussion of fertility goals — whether you are trying to conceive now, planning to in the future, or not at all, this shapes the treatment approach
- Lifestyle support — tailored nutrition and exercise guidance, with realistic, compassionate support
- Medication where appropriate — metformin, hormonal management, or fertility treatments depending on your needs
- Psychological support — addressing the emotional dimension of the condition
- Long-term monitoring — PMOS is a lifelong condition and requires ongoing attention to metabolic and cardiovascular health
Frequently Asked Questions: PMOS Symptoms and Diagnosis
Can you have PMOS without irregular periods?
Yes. It is possible to have PMOS with relatively regular cycles that are nonetheless anovulatory, or to have two of the other diagnostic criteria without meeting the ovulatory dysfunction criterion.
Can you have PMOS if you’re not overweight?
Absolutely. PMOS occurs across all body types. Insulin resistance is present in approximately 75% of lean women with PMOS. Weight is a contributing factor to severity in some women, but it is not a requirement for diagnosis.
Does PMOS show up on an ultrasound?
Sometimes, but not always. Polycystic ovarian morphology on ultrasound is one of three diagnostic criteria, but it is not required for a PMOS diagnosis. Many women with PMOS do not show classic findings on ultrasound, particularly lean women.
Can PMOS be confused with other conditions?
Yes. Thyroid disorders, elevated prolactin, congenital adrenal hyperplasia, and Cushing’s syndrome can all produce symptoms that overlap with PMOS. A thorough diagnostic workup should exclude these conditions.
Is AMH testing useful for PMOS diagnosis?
Yes. Elevated AMH has been included in international adult diagnostic criteria as an alternative to ultrasound. It reflects the number of developing follicles and is typically elevated in PMOS.
What is the difference between having PMOS and having polycystic ovaries on ultrasound?
Having polycystic ovarian morphology on ultrasound alone does not mean you have PMOS. The ultrasound appearance is one criterion of three; a PMOS diagnosis requires meeting at least two criteria after other causes are excluded.
Disclaimer: This content is for educational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before making decisions about fertility treatment.
About the Author
Leigh-Ann Geydien is the founder of Fertility Solutions, South Africa’s only dedicated fertility directory. With a deep commitment to patient advocacy, she built the platform to bridge the gap between those navigating fertility challenges and the clinics and reproductive health specialists best placed to help them.
