Nausea, usually mild, is experienced by 50 percent of women who use ECPs. Up to one out of three women experience vomiting. Breast tenderness, irregular bleeding, fluid retention, and headaches may also occur. Frequent use of ECPs may cause periods to become quite irregular and unpredictable. Emergency contraception may not prevent ectopic pregnancy .
Ectopic pregnancies develop outside the uterus.
They must be treated or they will cause complications that may cause death. If you think you may have an ectopic pregnancy, get medical attention immediately . Currently, there is no reason to believe that ECPs will harm a fetus. Nevertheless, it is advised that you should not use emergency contraception if you are pregnant. This site is produced by The Journal of the American Medical Association .