Birth Control
Emergency Contraception
(Morning After Pill)
What is emergency contraception?
Emergency contraception is a method of preventing pregnancy after unprotected sexual intercourse. It is for emergency use and should not be relied upon as a method of birth control. Emergency contraception is most effective if it is used as soon as possible after unprotected sex.
How does it work?
You take fairly high doses of progestin (a synthetic form of the hormone progesterone), with or without the hormone estrogen. (These are also the hormones used in birth control pills). If taken within 72 hours (three days) of unprotected sex, the hormones have a very high success rate at preventing ovulation or implantation of a fertilized egg in the lining of the uterus.
How is it used?
There are two effective ways to use emergency contraception. In the first method, a woman takes two prescribed progestin tablets alone. In the second, she takes hormone pills (either progestin alone or a progestin-estrogen combination) once, and then again 12 hours later. A medical provider will tell you which method is correct for you.
When should I use it?
Emergency contraception is no substitute for good before-the-fact birth control. Talk with your health care provider about preventing pregnancy and sexually transmitted infections, BEFORE the issues arise. You would use this method only in an emergency, such as:
- You were forced to have sex without protection
- You had sex without using any kind of birth control protection
- You used a condom or other barrier method but it broke
- You missed more than two birth control pills and didn't use a condom
Common side effects include nausea and occasionally vomiting. If pregnancy does occur despite using the birth control pills, there is no increased risk of birth defects. You should not use emergency contraception if you are already pregnant, know you are sensitive or allergic to the medication, or have been having abnormal vaginal bleeding.
Does it protect against sexually transmitted infections (STIs)?
No.
Things you should know:
Don't just take whatever birth control pills you might have around the house or get from friends. The proper number of pills to take depends on which type of pill you use. You should check with a medical provider to find out what number of pills is right for you.
This method is not approved for use when taken more than three days after unprotected sex. Call your health care provider to discuss options after this three-day interval has passed.
In some states (Alaska, California, Hawaii, New Mexico and Washington), emergency contraception can be distributed by pharmacists, without a prescription from a medical provider.
Emergency contraception does not cause an abortion. Emergency contraception works by preventing a pregnancy from occurring, not by terminating a pregnancy.
Additional Outside Sources
Below is additional information and resources. Some are links to other Internet pages, which might have information on health topics of interest to you. PAMF, however, does not sponsor or endorse any of these sites, nor does PAMF guarantee the accuracy of the information contained on them. In addition, PAMF has no control over the privacy practices of external Web sites. The user should read and understand the policies of all Web sites with respect to their privacy practices. These links are provided for your general information and education only, and should NOT be relied upon for personal diagnosis or treatment. If you have questions, please contact your health care provider.
Planned Parenthood. Birth Control. Accessed March 2008.
National Women's Health Information Center. Birth Control Methods. Accessed March 2008.
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