PCOS is now PMOS: what changes for Filipinas (and what doesn't)

What happened on 12 May 2026

The Lancet published “Polyendocrine metabolic ovarian syndrome, the new name for polycystic ovary syndrome: a multistep global consensus process” by Teede HJ, Bahri Khomami M, Morman R and colleagues (DOI 10.1016/S0140-6736(26)00717-8).

The work was led by Professor Helena Teede of Monash University, with Terhi Piltonen, Anuja Dokras and Rachel Morman. It was launched by Monash's Centre for Research Excellence in Women's Health, the Androgen Excess and PCOS Society, and the UK charity Verity. ESHRE took part through the International PCOS Guideline steering group.

New name

Polyendocrine metabolic ovarian syndrome (PMOS)

Announced

12 May 2026, in The Lancet

Who agreed

56 patient and professional organisations on six continents

Who was asked

14,360 survey responses in 2025 and 2026 (10,411 patients, 3,949 health professionals)

Vote

86% of patients and 71% of professionals wanted a symptom-based name

Full adoption

2028 International Guideline update

This was not a few experts in a room. Two global surveys, in April 2025 and January 2026, collected 14,360 responses on top of 7,708 earlier ones. Patients had the biggest say, and most of them wanted a name that describes what they actually live with.

The PMOS explainer card

Tap between “what changed” and “what did not change”. Switch to Taglish if you want to share it with family.

What each word means

The new name is long, but each word tells you something true about the condition.

• Polyendocrine: “poly” means many, and “endocrine” means hormones. Several hormone systems are involved, including androgens (like testosterone), insulin, and the hormones that control ovulation.
• Metabolic: insulin resistance is central for many people with PMOS. This is why doctors check blood sugar and cholesterol, and why the condition raises the risk of type 2 diabetes. It happens at any body size.
• Ovarian: the ovaries are still affected. Irregular ovulation causes irregular periods and can make it harder to get pregnant.
• Syndrome: a group of features that tend to appear together. Not everyone has all of them, which is why PMOS looks different from one person to the next.

The new name matches what the Symptom Map shows: PMOS affects your skin, hair, metabolism, mood and cycle, not only your ovaries.

Bakit tinanggal ang “cysts”?

The old name, polycystic ovary syndrome, made many Filipinas think they had dangerous cysts that needed surgery. In fact, most people with the condition do not have true cysts. What an ultrasound shows are many small follicles, which are immature egg sacs that did not finish growing.

The investigators wrote that accuracy “was improved by omitting cysts” and by naming the endocrine, metabolic and ovarian problems instead. The old name also led people to think a normal ultrasound meant they were “PCOS-free”, even when their blood sugar or cholesterol was still a problem. The new name puts metabolism front and centre, so that risk is harder to miss.

Who already uses PMOS

The switch is already happening, which is why you may see both names online.

• NHS (UK): its main page now says PMOS “used to be called polycystic ovary syndrome (PCOS).”
• Mayo Clinic: its page is now about PMOS, which “used to be called” PCOS.
• Hati Health (Philippines): labels lab packages as “PMOS (formerly PCOS)”, for example the Hi-Precision comprehensive screening.
• NowServing (Philippines): has a page titled “PCOS (PMOS) Doctor in the Philippines”.

On r/PCOSPhilippines, Filipinas already write “PCOS/PMOS”, and on r/PCOS one member said their doctors and therapist “are already in the habit of saying PMOS.” This site uses “PCOS (now called PMOS)” in titles and “PMOS, formerly PCOS” in the text, the same pattern as NHS, Mayo and Hati.

Timeline to 2028

1. April 2025 and January 2026: two global surveys of patients and health professionals.
2. 12 May 2026: the new name is published in The Lancet.
3. 2026 to 2028: a three-year transition. In the words of the group, both names “will co-exist.” ICD codes, hospital records and textbooks update over this period.
4. 2028: the International Evidence-based Guideline update adopts PMOS fully.

So if your lab result says PCOS and your new doctor says PMOS, both are right. If your HMO or a form only lists PCOS, that is expected for now.

Your diagnosis and treatment stay the same

This is the most important part. The rename is about words, not about your care.

• Diagnosis: doctors still use the 2023 International Guideline, which needs two of three features (irregular ovulation, high androgens, and polycystic ovaries on ultrasound or a high AMH in adults), after ruling out thyroid, prolactin and other causes. No new criteria came with the rename. See how PCOS is diagnosed.
• Treatment: the combined pill, metformin, spironolactone, letrozole and lifestyle support work exactly as before. See all treatments.
• Costs: lab packages and consults cost the same, even if the label now says PMOS. See what a check-up costs.

Do not stop or change any medicine because of the new name.

This guide is for information. Talk to a doctor before starting or changing any treatment.

Common mistakes about the name

Some Philippine pages already get the name wrong. A hospital social media post expanded PMOS with “polycystic” still in it, and a popular health site linked to an “Ano nga ba ang PMOS?” page that did not answer the question. The correct expansion has no “cystic” in it at all: polyendocrine metabolic ovarian syndrome.

Another mistake is thinking PMOS is a new or different disease. It is not. It is also not a sign that your condition got worse or changed type.

• What is PCOS (PMOS)?Causes, symptoms, the four types and why it matters.→
• Ano ang PMOS?Ang paliwanag na ito sa Taglish.→
• SymptomsEvery sign, from irregular regla to tagyawat.→