Table I.

Diagnostic criteria of polycystic ovary syndrome (1990-2009)

PCOS definition	Clinical hyperandrogenism or biochemical hyperandrogenism (elevated total/free testosterone)	Oligomenorrhoea or oligo-anovulation	Polycystic ovaries on ultrasound
NIH (1990)11	Yes	Yes	Not included
ESHRE/ASRM Rotterdam (2003)8 2 of 3 criteria	Yes/no	Yes/no	Yes/no
AE-PCOS Society (2006)12	Yes	Yes/no	Yes/no

PCOS, polycystic ovary syndrome; AE, androgen excess; NIH, National Institutes of Health; ASRM, American Society for Reproductive Medicine; ESHRE, European Society of Human Reproduction and Embryology