How does the emergency contraception pill work?
A. The ECP works in two ways. The pill may keep your ovary from releasing an egg, which will prevent fertilization. The pill may also change your uterine lining so that, in the event that an egg is fertilized, it will not be able to implant on the uterine wall, which is generally necessary for pregnancy to continue. The ECP may not prevent an ectopic pregnancy, which is pregnancy outside of the uterus. Symptoms of ectopic pregnancies include sharp pain on either or both sides of your abdomen, abdominal pain and spotting, after a light or missed period, and feeling faint or dizzy. If you think you may have an ectopic pregnancy, visit your clinician immediately, as an ectopic pregnancy can be a life-threatening matter.
