RETRACTED: Therapeutic effects of metformin and laparoscopic ovarian drilling in treatment of clomiphene and insulin-resistant polycystic ovary syndrome (Retracted article. See vol. 293, pg. 693, 2016)

To compare the therapeutic effects of metformin (Met) and laparoscopic ovarian drilling (LOD) in clomiphene and insulin-resistant patients with polycystic ovary syndrome (CIRPCOS). A total of 110 patients were randomly divided into two groups. One group was administered Met (n = 55), while the other group underwent LOD (n = 55). Rates of ovulation, pregnancy, and abortion were compared between both groups. Rates of normal menstruation, ovulation, and pregnancy in the LOD group were higher than in the Met group: 76.4 % (42/55) vs. 58.2 % (32/55), P < 0.04; 50.8 % (11/258) vs. 33.5 % (94/281), P < 0.001; 38.2 % (21/55) vs. 20.0 % (11/55), P < 0.03. The difference in the early abortion rate between both groups was not statistically significant. Although Met can significantly improve a patient's insulin resistance, we found that in patients diagnosed with CIRCPOS, LOD can be much more effective in improving rates of normal menstruation, ovulation, and pregnancy.