No cysts needed: what the diagnosis actually requires
Evidence last assessed 2026-10-14.
In short
- What the research shows
- Cysts are not required for the diagnosis; no single feature is mandatory.
- What it doesn't show
- It says what the criteria are, not whether you meet them.
- PMOS
- Tests and appointments
See studies and method
What the evidence says
Cysts are not required for the diagnosis, and their absence does not rule it out: the criteria rest on a combination of features, and in adults, no single one is mandatory. The 'cysts' are also not what the word suggests. They are small follicles, not disease cysts that need removing.
Diagnostic criteria rest on a combination of irregular or absent ovulation, signs or bloodwork of elevated androgens, and polycystic-appearing ovaries on ultrasound, and in adults no single feature is mandatory. The ultrasound appearance is also not specific: in a community study of women aged 25–45 who were ovulating regularly, about a third had polycystic-appearing ovaries by the older ultrasound definition, which the 2023 international guideline has since made stricter. An ultrasound finding alone neither makes nor unmakes this diagnosis.
What this does not show
This says what the criteria are, not whether you meet them; that judgement is your clinician's, with your history and results, and nothing here is a diagnosis. 'About a third' is 32% in one study of 262 women aged 25–45 who were ovulating, using an older threshold of 12 or more follicles in one ovary. The 2023 threshold is 20, so the share would be lower today, and that lower share was not measured. Criteria also differ a little between medical bodies and eras, and adolescents are assessed differently: the 2023 guideline says ultrasound should not be used to diagnose it in adolescents.
Sources, as Neta holds them
Rotterdam ESHRE/ASRM-Sponsored PCOS Consensus Workshop Group. Revised 2003 consensus on diagnostic criteria and long-term health risks related to polycystic ovary syndrome (PCOS). Hum Reprod. 2004;19(1):41-7. doi:10.1093/humrep/deh098
Guideline synthesis
Teede HJ, Tay CT, Laven JJE, Dokras A, Moran LJ, Piltonen TT, et al. Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. J Clin Endocrinol Metab. 2023;108(10):2447-69. doi:10.1210/clinem/dgad463
Guideline synthesis
Johnstone EB, Rosen MP, Neril R, et al. The polycystic ovary post-Rotterdam: a common, age-dependent finding in ovulatory women without metabolic significance. J Clin Endocrinol Metab. 2010;95(11):4965-72. doi:10.1210/jc.2010-0202
People compared with each other · 262 participants