PMOS is a proposed new name, Polyendocrine Metabolic Ovarian Syndrome, for the condition long known as PCOS.
What the name PMOS means
PMOS stands for Polyendocrine Metabolic Ovarian Syndrome, a name proposed in 2026 to replace the term PCOS. The condition it describes is the same, only the label changes. The proposal tries to correct the misunderstanding that the condition is mainly about ovarian cysts, when in fact it involves several body systems. The word polyendocrine points to several hormone glands, while metabolic refers to how the body processes energy. The new name emphasises that assessment should look beyond the ovary picture alone.
Why the name was proposed
In real life, many people experience a mix of hormonal, metabolic, skin, menstrual, fertility, weight, and mental-health features. The older term was seen as too narrow because it focused on the ovaries, and some people felt the name did not reflect their experience. Some patients also do not have obvious cysts on the ovaries, so the old name could be confusing. For an overview of these varied features, see PCOS symptoms and what is PCOS. Keep in mind that this name change is a proposal still in transition, and adoption varies between countries and health bodies, so you may still hear both terms used for some time.
Does this change your care
PCOS will still be used for a long time because readers, doctors, older records, and web searches already know it. Do not worry if a referral letter or blood result still says PCOS, because both terms refer to the same condition. The way the condition is assessed and managed does not change simply because the name does, so your existing care plan still stands. The change is more about how the condition is understood and described.
When to talk to a doctor
If you are confused by the terms in your medical reports, a doctor or pharmacist can explain what they mean. They can also describe the assessment steps that suit your situation and answer questions about the new name. There is no need to worry if you are still more familiar with the term PCOS, because it remains correct to use. More detail about this name change is on the PCOS is now called PMOS page.
This glossary is education, not diagnosis. For your own situation, ask a doctor or pharmacist.