Objective:To explore the effects of monopolar electrocoagulation and bipolar electrocoagulation in laparoscopy for infertility on ovarian function. Methods:100 infertile patients because of tubal factor were selected,and all the patients received fallopian tube surgery under laparoscope,then they were divided into monopolar electrocoagulation group(50 women) and bipolar electrocoagulation group(50 women) according to different hemostatic methods.Their blood samples were obtained to detect the levels of follicle-stimulating hormone(FSH),luteinizing hormone(LH) and estradiol before surgery,at one and three months after surgery,B ultrasound was used to monitor the ovulation situation from the eleventh day of menstrual cycle,all the patients were followed up for one year after surgery. Results:Compared with before surgery,the levels of FSH and LH at one and three months after surgery increased,the level of estradiol decreased,there was significant difference in monopolar electrocoagulation group(P0.05),but there was no significant difference in bipolar electrocoagulation group(P0.05). Conclusion:Monopolar electrocoagulation and bipolar electrocoagulation harm ovarian function in laparoscopy for infertility,and the injury from monopolar electrocoagulation is larger than that from bipolar electrocoagulation.The menstrual changes after surgery in monopolar electrocoagulation group are more than those in bipolar electrocoagulation group(P0.05).The pregnancy rate after surgery in bipolar electrocoagulation group is higher than that in monopolar electrocoagulation group.