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Obstet Gynecol. 1982 Sep;60(3):326-30.

Risk of ectopic pregnancy following tubal sterilization.


To determine the impact of tubal sterilization on the overall incidence of ectopic pregnancy, the authors compared reported incidence rates of ectopic pregnancy after tubal sterilization with the rates associated with other contraceptive methods or no contraception. For each contraceptive method they then calculated the cumulative lifetime risk of ectopic pregnancy from the age at which a final contraceptive choice was made. Tubal sterilization was found to be associated with a lower cumulative lifetime risk of ectopic pregnancy than no contraception or use of an intrauterine contraceptive device. Tubal sterilization carries a somewhat higher risk of ectopic pregnancy than do barrier methods of contraception. Oral contraceptives are associated with a much lower ectopic pregnancy for most than any other contraceptive method or no contraception. Overall, however, the risk of an ectopic pregnancy for most women undergoing tubal sterilization in the United States is estimated to be lower than if they had not been sterilized and had continued their previous contraceptive practices.

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