Table 1. Diagnostic criteria of PCOS.
Diagnostic Criteria	Year of proposal of criteria	Diagnostic features
1. National Institute of Health/ National Institute of Child Health and Human Development	April 1990	1) Hyperandrogenism and/or hyperandrogenism 2) Anovulation or oligo-ovulation 3) The exclusion of a few related conditions, such as congenital adrenal hyperplasia, hyperprolactinemia, and thyroid.
2. Rotterdam criteria European Society of Human Reproduction and Embryology and American Society of Reproductive Medicine	May 2003	Any two of the three traits listed below that describe women: 1) Over-androgenism 2) Oligo-ovulation or anovulation 3) Ovarian polycystic morphology Removal of related illnesses
3. Androgen Excess and PCOS Society	2006	1) Clinical analysis of hirsutism and biochemical analysis of hyperandrogenism involve hyperandrogenemia. 2) Ovarian dysfunction about polycystic ovaries or olig-ovulation/anovulation Removal of overproduction of diseases related to androgen