Unintended pregnancy is surprisingly common. At least half of all pregnancies in the United States each year are mistimed or unplanned, because birth control measures were not used or those that were used did not work. An emergency contraceptive pill is available to provide women with another option for preventing unintended pregnancy
There are many options for birth control, but there are also products that have been developed specifically for use only in an emergency.
Emergency contraceptive pills prevent pregnancy in a variety of ways. Depending on the time of the month in a woman's cycle, the drug may prevent ovulation (release of the egg from the ovary), interfere with fertilization, or prevent a fertilized egg from attaching in the uterus. They will not induce an abortion if a woman is already pregnant, according to the definition of pregnancy used by the National Institutes of Health and the American Congress of Obstetricians and Gynecologists.
Last reviewedJuly 2013by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.