Published online by Cambridge University Press: 13 May 2022
The prevalence of polycystic ovary syndrome (PCOS), one of the most common female endocrine disorders, depends on the diagnostic criteria used and the study population (referral or unselected). It is also thought to be influenced by race and ethnicity. This chapter presents the current knowledge on the epidemiological aspects of PCOS and its prevalence based on the different diagnostic criteria – National Institutes of Health (NIH) 1990; European Society of Human Reproduction (ESHRE) and American Society for Reproductive Medicine (ASRM) (Rotterdam 2003); and Androgen Excess and PCOS (AE-PCOS) Society 2006 – estimated in the selected and the unselected medically unbiased populations. The evidence-based data regarding the relationship between PCOS and race as well as ethnicity are also discussed. Finally, this chapter presents the key points on the best practices for epidemiologic studies in PCOS as outlined in the current guidelines.
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