Progression to impaired glucose tolerance or type 2 diabetes mellitus in polycystic ovary syndrome: a controlled follow-up study

Conversion rates from NGT to IGT or type 2 diabetes mellitus were accelerated in women with PCOS compared with healthy subjects. Women with PCOS should be tested regularly for early detection of abnormal glucose tolerance. In addition, the interval for periodic rescreening should be determined by further studies involving more women with PCOS.