If you or someone you know has PCOS, here’s a development worth paying attention to: the condition has officially been renamed. Polycystic Ovary Syndrome (PCOS) is now called Polyendocrine Metabolic Ovarian Syndrome, or PMOS — a change backed by more than 56 patient and professional organizations, including the Endocrine Society, a global group of physicians and scientists. The name change journey, published in The Lancet, has been a long time in the making.

The old name was part of the problem

For decades, the PCOS label quietly did a disservice to millions of women. It reduced a complex, long-term hormonal disorder to a misunderstanding about cysts and a narrow focus on the ovaries, contributing to missed diagnoses and inadequate treatment.

The reality, as research has since confirmed, is far broader: PMOS is characterized by hormonal fluctuations with wide-ranging impacts on weight, metabolic health, mental health, skin, and the reproductive system. As for the cysts that gave the condition its original name, research has confirmed there is no actual increase in abnormal ovarian cysts in the condition.

According to studies, 1 in 8 women (or over 170 million women worldwide) are living with this condition. A name that finally reflects what they’re actually going through is a small but meaningful step toward better understanding, better diagnosis, and better care.

The name change took 14 years

According to The Lancet, the renaming process took 14 years of global collaboration, drew more than 22,000 survey responses, and involved multiple international workshops with patients and multidisciplinary health professionals.

“In 2012, the US National Institutes of Health Office of Disease Prevention Evidence-based Methodology Workshop on PCOS highlighted the challenges and inaccuracy of the current name, and recommended a change to better reflect the condition,” read the paper.

Cultural sensitivity was a deliberate part of the process, too, making sure the new name avoided certain reproductive terms that could heighten stigma or be harmful for women in some countries. Experts are calling the findings published in The Lancet the largest initiative to change the name of a medical condition in history.

What happens next?

The name doesn’t change overnight. A three-year transition period is underway, supported by a major international education and awareness campaign, with the new name set to be fully implemented in the 2028 International Guideline update.

For now, if your doctor still says PCOS, that’s normal, but the shift is coming, and it’s one that advocates say is long overdue.

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