PCOS was previously defined according to the proceedings of an expert conference sponsored by the National Institutes of Health (NIH) in 1990, which described the disorder as including hyperandrogenism or hyperandrogenemia (or both), oligo-ovulation, and exclusion of known disorders of androgen excess and anovulation. Another expert conference held in Rotterdam in 2003 defined PCOS, after the exclusion of related disorders, by the presence of two of the following three features oligo-ovulation or anovulation, clinical or biochemical signs of hyperandrogenism (or both), and polycystic ovaries. In essence, the Rotterdam 2003<unk>  expanded the NIH 1990 definition by creating two new phenotypes ovulatory women with polycystic ovaries plus hyperandrogenism and oligo-anovulatory women with polycystic ovaries but without hyperandrogenism.
Polycystic ovary syndrome diagnostic criteria
Polycystic ovary syndrome classification
Polycystic ovary syndrome laboratory findings
Polycystic ovary syndrome physical examination
Hypogonadism classification
Polycystic ovary syndrome epidemiology and demographics
Menopause laboratory findings
Ovarian cancer risk factors