Abstract:To analyze natural pregnancy rate and its influence factors in post-operative infertile patients with endometriosis. Methods A retrospective analysis was carried out from January 2011 to January 2014 in 138 infertile patients diagnosed with endometriosis. All of them underwent surgeries in the First Affiliated Hospital of Soochow University. The patients were followed up by telephone and outpatient interview.The clinical data and operation of the patients were statistically studied, and the natural pregnancy rate and related factors were analyzed. Results Totally 45 patients gained natural pregnancy (32.61%). Multivariate logistic regression analysis showed that influence factors of natural pregnancy rate were age, type of infertility,pathological type, r-AFS staging, preoperative AMH and whether receiving postoperative GnRH-a treatment or not ( p< 0.05). Conclusions Surgery can significantly improve natural pregnancy rate in infertile patients with endometriosis and it is an effective method for treatment of infertility caused by endometriosis.