Ectopic pregnancies following emergency levonorgestrel contraception.

There are little or no data on the risk of ectopic pregnancy following levonorgestrel treatment as an emergency contraception. We encountered three cases of ectopic pregnancy following the use of levonorgestrel administered peri- or postovulation. Here we report these cases and discuss the clinical and epidemiologic implications of this association. Health providers should be alert to the possibility of an ectopic pregnancy in women who become pregnant or complain of lower abdominal pain after taking levonorgestrel.