The 13.5-mg, 19.5-mg, and 52-mg Levonorgestrel-Releasing Intrauterine Systems and Risk of Ectopic Pregnancy.

Objective: To assess the Pearl Index for risk of ectopic pregnancy in women using levonorgestrel-releasing intrauterine systems (LNG-IUS) with hormonal reservoirs of 13.5 mg, 19.5 mg, or 52 mg.

Contraceptive use at the time of and after an ectopic pregnancy: a retrospective cohort study.

Approximately, 1-2% of all pregnancies are ectopic; 25% of unintended pregnancies are conceived despite the use of contraception. The primary objective of our study was to explore the proportion of ectopic pregnancies (EPs) that were conceived during contraceptive use among women in Stockholm County. Secondary objectives were to establish the prevalence of contraceptive methods used at the time of EP and the intended contraceptive method after treatment completion.