What is polycystic ovarian syndrome? A proposal for a consensus on the definition and diagnosis of polycystic ovarian syndrome.

The criteria for diagnosis and definition of polycystic ovarian syndrome used by clinicians and investigators are almost as heterogeneous as the syndrome itself. This has confused and seriously hindered the clarification of the genetics, aetiology, clinical associations and assessment of treatment and later sequelae of the syndrome. This article proposes a consensus for a unifying balanced and practical working definition for use as a standard. The proposal incorporates confirmation of the diagnosis suggested by clinical symptoms by ultrasound, and the use of hormonal estimations if typical ultrasound features are not seen and for the purpose of defining subsets of the syndrome. This consensus proposal attempts to bridge the gap between predominately American biochemical marker-based diagnosis and predominately European reliance on ultrasound as a sine qua non for diagnosis. It has been deliberately designed to be simple, practical and cheap, and if universally adopted as a standard could contribute much to all future work involving this most prevalent of syndromes.