Reproductive endocrinology: Metformin or thiazolidinedione therapy in PCOS?

@article{Grover2011ReproductiveEM,
  title={Reproductive endocrinology: Metformin or thiazolidinedione therapy in PCOS?},
  author={A. Grover and M. Yialamas},
  journal={Nature Reviews Endocrinology},
  year={2011},
  volume={7},
  pages={128-129}
}
Insulin resistance has a key role in the pathogenesis of polycystic ovary syndrome, a common endocrinopathy that affects young women. Therefore, the use of insulin-sensitizing agents has been studied extensively in this patient population. Given the effectiveness of metformin and thiazolidinediones in previous studies, the question arises: is one class better than the other? 
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