Introduction. Polycystic ovary syndrome (PCOS) is a common comorbidity found in obese women of reproductive age. It is associated with significant clinical manifestations of menstrual irregularities, infertility and androgen excess. Bariatric surgery has been widely proven to be a successful management strategy for morbid obesity and metabolic syndrome, but limited studies exist on its effect on PCOS. To our knowledge, we are the first to systematically review the literature and perform a meta-analysis on the impact of bariatric surgery on PCOS.