INS and polycystic ovary syndrome: Therefore, the purpose of this study is to assess early pathophysiological characteristics of carbohydrate metabolism (i.e. glucose, insulin, and C-peptide dynamics during an oral glucose tolerance test (OGTT), insulin sensitivity, secretion, extraction and ß-cell function) and their association with hepatocellular and intramyocellular lipid content with particular focus on the clinical classification of PCOS.