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.
Pregnancy Prevention—Nearly 90%If taken within 120 hours (5 days), emergency contraceptive pills reduce the chance of pregnancy by almost 90% after one act of unprotected sex. The sooner treatment begins, the more likely it will be effective. Some health experts have reservations about the use of emergency contraception. They argue that women may not take normal precautions. The convenience of swallowing 2 pills may indeed be attractive to those who might otherwise use a barrier method of contraception, like a condom, that helps prevent the spread of HIV and some other sexually transmitted diseases. However, studies done to evaluate this topic have repeatedly shown that immediate access to emergency contraception does not alter a woman’s (or adolescent’s) sexual behavior nor contraception choices.
You Should KnowIf you plan to take emergency contraceptive pills, here are some important things to keep in mind:
- Do not swallow any extra pills. Extra pills will not further reduce your risk of pregnancy, but they could make you feel sick.
- If you throw up within 1 hour of taking the pills, call your doctor. You may need to repeat a dose or take anti-nausea medicine.
- Call your doctor if you have any of these symptoms:
- Severe leg pain
- Severe abdominal pain
- Chest pain, cough, or shortness of breath
- Blurred or loss of vision
- Using emergency contraception frequently can cause your menstrual cycle to become irregular.
- You should start your period within a month. If you do not have a period when you expect to, take a pregnancy test.