Defining what is normal: the key to the diagnosis of polycystic ovary syndrome (and any other disorder for that matter…)

Defining what is normal: the key to the diagnosis of polycystic ovary syndrome (and any other disorder for that matter…)
There has been much debate and gnashing of teeth concerning the criteria to diagnose polycystic ovary syndrome (PCOS). However, the recent realization that all three of the current criteria (National Institutes of Health [NIH] 1990, Rotterdam 2003, and Androgen Excess & PCOS Society [AE-PCOS] 2006) are comparable when we understand that PCOS, as diagnosed at present, can be subdivided into four phenotypes (A–D), has lessened the contest. Some of the criteria simply include more or less phenotypes than others (e.g., Rotterdam 2003 includes all four, whereas AE-PCOS Society 2006 includes A through C only, and NIH 1990 A and B only).
Source: fertstert.org