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Objectives: Objective was to evaluate anti-Müllerian-hormone (AMH) and parameters for insulin resistance (IR) in the main phenotypes of polycystic ovarian syndrome (PCOS), and to investigate their correlation for the first time in non-obese Chinese women., Methods: Within this prospective study, 160 PCOS cases and 40 healthy women, matched by age and BMI, were included. In four groups (n = 40) according to the four phenotypes of PCOS by definition of the National Institute of Health (2012), AMH, ovarian volume and number of follicles 2-9 mm were assessed as well as insulin resistance indexes (Homeostatic Model Assessment) (HOMA-IR) and Quantitative Insulin Sensitivity Check Index (QUICKI)., Results: AMH levels were higher in PCOS than in controls, with differences comparing the phenotypes, highest in the group with all three criteria for PCOS. However, for HOMA-IR and QUICKI and correlation to AMH no significant differences were found., Conclusions: AMH is a useful parameter to assess in the different phenotypes the severity of PCOS, and to compare with healthy women, for the first time demonstrated in Chinese patients. In contrast, the parameters for IR and their relation to AMH did not show clear differences comparing the four phenotypes, and need further investigation.