IUD use and subsequent tubal ectopic pregnancy.

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Abstract
As part of a case-control study of tubal ectopic pregnancy (TEP), we sought to evaluate the possible etiologic role of use of an intrauterine device (IUD) prior to conception. We interviewed 155 women who had a tubal ectopic pregnancy treated at one of five Seattle, Washington hospitals between 1975-79 regarding their reproductive, contraceptive, and medical histories; 456 women who delivered a baby in King County during the same period were identified from vital records and interviewed as controls. An elevated risk of TEP was detected among former users of the Dalkon Shield (adjusted OR = 2.5; 95% CI = 1.3-4.7). Women who had used other IUDs did not have an excess risk of TEP.

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