12/05/2026
Polyendocrine Metabolic Ovarian Syndrome (PMOS) is the new name for the condition previously known as Polycystic O***y Syndrome (PCOS) — a change that accurately reflects the condition, which affects 1 in 8 women, or more than 170 million worldwide.
The changes follows 14 years of research and advocacy and the largest global engagement ever for a medical name change, with more than 22,000 survey responses, workshops with women who have lived experience, health professionals, and the involvement of 56 patient organisations and professional societies around the world.
The term PCOS focused on “cysts” and ovaries, even though women don’t have cysts. PMOS is a long term endocrine/ hormonal and metabolic condition, and the misunderstanding has contributed to delayed diagnosis, poor quality of care and lack of research and funding.
Women living with the condition led the call for change — and their voices matter ❤️ 86% of patients and 76% of health professionals support the name change.
The change to PMOS will improve understanding, awareness, earlier diagnosis, better care and more research.
We recognise that this change will take time and there is a 3 year transition period where both names will co-exist together - the work doesn’t stop here!
Prof Helena Teede led this global initiative with Verity - PCOS Charity& the AE PCOS Society. The work is published in The Lancet. Congratulations to everyone involved!
Now available:
âś… Resources in multiple languages: bit.ly/3V85nPJ
âś… Video: bit.ly/4eHAkoR
âś… Animation explainer: bit.ly/49KILwf
âś… The Lancet: bit.ly/4uHFpSK