Also known as an extrauterine pregnancy, an ectopic pregnancy is a potentially life-threatening condition in which a fertilized egg implants outside of the
uterus—most often in the fallopian tubes. The morning-after pill won’t end an ectopic pregnancy. If you have severe abdominal pain three to five weeks after using the morning-after pill, see your health care professional to rule out an ectopic pregnancy. If an embryo is growing in a fallopian tube, you will need to seek emergency care.
Source: © 2009, 2012 Focus on the Family “The Morning-After Pill” pamphlet
Footnote 1: FDA Prescribing and Label Information for Plan B One-Step®, Rev. July 2009; pp. 13-14; www.accessdata.fda.gov/drugsatfda_docs/label/2009/021998lbl.pdf
Footnote 2: FDA Prescribing and Label Information for Plan B One-Step®, Rev. July 2009, p. 6 and 17; See footnote 1
Footnote 3: Picture from www.mayoclinic.org