Dear mrmartay,

EC taken the day before unprotected sex could prevent pregnancy, depending on when a woman ovulates. However, it's better to take EC as soon as possible after unprotected sex or contraceptive failure. EC can reduce the risk of pregnancy if started within 120 hours of unprotected vaginal intercourse. If started within 72 hours of unprotected sex, EC can reduce the risk of pregnancy by 75 to 89 percent.

EC is one of the safest and most effective ways to prevent unintended pregnancy. Women should feel free to use EC whenever they think it's necessary. EC is not recommended for ongoing use because EC is not as effective as the IUD, the pill, the patch, the ring, or the shot. Also, frequent use of EC may cause periods to become irregular and unpredictable.

EC is now available to women over 18 without a prescription. Teens under 18 can still access EC the old-fashioned way — with a prescription. The best way young women can protect themselves is to get a prescription for EC before an accident happens, and keep it on hand in case they need it. That way, they won't waste time after unprotected intercourse waiting to get an appointment with a health care provider and trying to get a prescription filled.

Hope this information helps!

Take care,

teenwire.com^® Editors

This column is for informational purposes only and is not intended to constitute medical advice, diagnosis, or treatment. If you have a medical problem, please call toll-free 1-800-230-PLAN for an appointment with the Planned Parenthood health center nearest you.