Abstract:Objective To observe and explore the clinical effect of Metformin (Met) combination with Ethinylestradiol and Cyproterone tablets (Diane-35) on relevant hormone levels in patients with polycystic overy syndrome (PCOS). Methods Totally 152 PCOS patients who accepted drug treatment during April 2011 and March 2015 in our hospital were selected and divided into two groups accorded to the random number method with 76 cases in each group. The control group was treated with oral Diane-35, while the observation group was treated with oral Diane-35 and Met. Sex hormone (LH, FSH and TEST) levels, insulin resistance index (HOMA-IR), insulin secretion index (HOMA-β) before and after treatment were recorded and compared between the two groups and were evaluated as integrated effect. Results The difference in LH, FSH, TEST, HOMA-IR or HOMA-β was not statistically significant between both groups before treatment (P > 0.05). After treatment LH, FSH, TEST, HOMA-IR and HOMA-β in the observation group were significantly lower than those in the control group (P < 0.05). The total effective rate was 94.7% (72/76) in the observation group and 76.3% (58/76) in the control group; the difference was statistically significant (P < 0.05). Conclusions Met combined with Diane-35 therapy can significantly improve endocrine function and IR in PCOS patients, and is thus a safe and effective treatment for PCOS.