PCOS Is Now Called PMOS
What changed, and what didn't
If you were diagnosed with PCOS, nothing about your condition has changed. Only the name has. Here is what the new name means and why it was changed.
Has PCOS been renamed, and does it affect my diagnosis?
Yes, PCOS has been renamed. In May 2026, Polycystic Ovary Syndrome became Polyendocrine Metabolic Ovarian Syndrome, shortened to PMOS, following an international consensus process. Your diagnosis has not changed. The condition, the diagnostic criteria and the treatment options are all exactly the same. You do not need to be re-tested or re-diagnosed. Both names will remain in use for several years, so a report that says PCOS and a doctor who says PMOS are describing the same thing.
- PCOS was renamed PMOS in May 2026 after an international consensus process.
- PMOS stands for Polyendocrine Metabolic Ovarian Syndrome.
- The condition itself, and how it is diagnosed and treated, did not change.
- You do not need to be re-tested or re-referred because of the rename.
- Both names will appear in medical records and materials for years to come.
One condition, two names
The words changed. The biology did not.
Polycystic Ovary Syndrome
Points at the ovaries, as though that is where the problem starts
Says "cysts", which are not actually cysts but immature follicles
Leaves out insulin resistance entirely, despite it driving the condition for many
Polyendocrine Metabolic Ovarian Syndrome
Names it as a whole-body hormonal condition, not an ovary problem
Drops the misleading reference to cysts
Puts the metabolic side in the name, where it is harder to overlook
What the new name actually says
Three words, each doing a job the old name did not.
Polyendocrine
More than one hormone system is involved. Not only the ovaries, but the thyroid, the adrenal glands and insulin signalling can all be part of the picture.
Metabolic
How your body handles energy and blood sugar. Insulin resistance sits at the centre of the condition for a large share of people, and the old name never mentioned it.
Ovarian
The reproductive link stays. Ovulation, cycle regularity and fertility are still affected, which is why the ovaries remain in the name.
Why the old name had to go
The word "polycystic" caused two specific problems, and both had real consequences for patients.
The cysts are not cysts. What shows up on an ultrasound is a collection of small, immature follicles that stalled before releasing an egg. They are not the fluid-filled growths most people picture when they hear the word cyst. Many people were told they had cysts on their ovaries and understandably assumed they needed them removed.
The name did not match who has the condition. A significant number of people diagnosed with PCOS never had polycystic ovaries on a scan. At the same time, plenty of people have polycystic-appearing ovaries and none of the hormonal or metabolic features. Naming a condition after a feature that is neither necessary nor sufficient to have it makes diagnosis harder, not easier.
The practical cost of that mismatch was delayed diagnosis. People without visible cysts were sometimes told they did not have PCOS, and the insulin resistance driving their symptoms went unaddressed for years. Renaming the condition around what actually causes it is intended to close that gap.
Does anything change for you?
In practical terms, almost nothing. Here is the short version.
Your diagnosis stands. If you were diagnosed with PCOS, you have PMOS. It is the same diagnosis under a new name.
No re-testing is required. You do not need new scans, new bloods or a new referral because of the rename.
Treatment is unchanged. Nothing about clinical management changed when the name did.
Both names stay in use. Expect to see PCOS on reports and letters for years. Transitions in medical terminology are deliberately slow.
Search both terms. Almost all existing research and support communities are still indexed under PCOS.
What this means for trying to conceive
The name change does not change your chances
Your prognosis is exactly what it was before May 2026. Many people with PMOS conceive, particularly once ovulation is restored and the metabolic drivers underneath are addressed.
What the new name does is make one thing harder to ignore. When a condition is called metabolic in its own name, insulin resistance, inflammation and blood sugar stability stop being a footnote to the conversation. For anyone trying to conceive, that reframing is useful, because those are the factors that most often respond to change.
The rename is a correction to the label, not new information about your body. If you were told your ovaries were the problem, the new name is a reminder that the picture was always bigger than that.
Common questions
Yes. In May 2026, Polycystic Ovary Syndrome was renamed Polyendocrine Metabolic Ovarian Syndrome following a major international consensus process. The change was announced on 12 May 2026.
Both names remain in use during the transition. If your doctor says PCOS, they are describing the same condition.
No. Your diagnosis has not changed. The condition, the diagnostic criteria and the treatment options are all exactly the same.
You do not need to be re-tested, re-diagnosed, or re-referred because of the rename.
The old name focused on polycystic ovaries, which was misleading in two ways.
First, the structures seen on an ultrasound are not true cysts, they are immature follicles. Second, many people diagnosed with the condition do not have polycystic ovaries at all, while many people with polycystic ovaries do not have the condition.
The new name puts the focus on the hormonal and metabolic dysfunction that actually drives it.
Polyendocrine means more than one hormone system is involved, not just the ovaries. Metabolic points to insulin resistance and how the body handles energy. Ovarian keeps the reproductive link, including effects on ovulation and fertility.
Together the name describes a whole-body hormonal and metabolic condition rather than an ovary problem.
Both, for several years. Terminology changes in medicine are deliberately gradual.
Records, test results, referral letters and patient materials will carry both names during the transition. If your report says PCOS and your consultant says PMOS, they are talking about the same condition.
No. Nothing about clinical management changed with the name.
What the new name does is make the metabolic side harder to overlook. Addressing insulin resistance, inflammation and hormonal signalling was already central to managing the condition well, and the name now reflects that.
Yes. Many people with PMOS conceive, particularly once ovulation is restored and the underlying metabolic drivers are addressed.
The rename does not change your prognosis in either direction. It is the same condition it was before May 2026. For a fuller picture of how it affects fertility, read the PCOS and PMOS fertility guide.
Search both. The overwhelming majority of existing research, patient resources and support communities are still indexed under PCOS, and that will remain true for years.
PMOS will return newer material. Neither term is wrong.
This page covers the name change only. For how the condition affects ovulation, insulin resistance and conception, read the full PCOS and PMOS fertility guide, or the PCOS and PMOS FAQ with 30 detailed answers.
Medical References
Key sources supporting the claims on this page.
- International consensus statement on the renaming of Polycystic Ovary Syndrome. Announced 12 May 2026. Confirm the full citation, journal and author list before publishing.
- Teede HJ, et al. International evidence-based guideline for the assessment and management of polycystic ovary syndrome. Human Reproduction.
- Practice Committee of the American Society for Reproductive Medicine. Role of metformin for ovulation induction in infertile patients with polycystic ovary syndrome: a guideline. Fertility and Sterility.
- Diamanti-Kandarakis E, Dunaif A. Insulin resistance and the polycystic ovary syndrome revisited: an update on mechanisms and implications. Endocrine Reviews.
- National Institute for Health and Care Excellence. Polycystic ovary syndrome: clinical knowledge summary.
About this article
Written by
Let's Conceive Editorial Team
Our editorial team creates evidence-based fertility education reviewed against major clinical guidelines and peer-reviewed research.
Reviewed by
Dr. Gopal Gawali
Gynaecologist. MS (Obstetrics & Gynaecology), MBBS.