When you have sex without birth control, your risk of getting pregnant is highest during the middle of your menstrual cycle - or about two weeks after the start of your last period. Which means if you have sex during these days, you are very likely to get pregnant. ECPs must be taken within 72 hours after having unprotected sex. The sooner you take them, the better. Emergency Contraceptive Pills are birth control pills that are used in a different way.
Women usually take one pill each day when they are using birth control pills.
When using ECPs, you take more than one pill within 72 hours after unprotected sex, and then more pills 12 hours later. The number of pills you take for ECPs depends on the kind you were using. To determine which pills is right for you, consult your doctor or visit Planned Parenthood. If you were to become pregnant and would choose not to consider abortion, it is necessary to think about the risks and benefits of ECP's. The benefit, of course, is you could prevent an unwanted pregnancy.