Emergency contraception

By Mayo Clinic Staff

Emergency contraception helps prevent pregnancy after unprotected sex. Emergency contraception isn't meant to be used in place of routine birth control — but it's an option if you've had unprotected sex, your method of birth control failed or you missed a birth control pill.

To be effective, emergency contraception must be used as soon as possible after unprotected sex. In the U.S., two types of emergency contraception are available: emergency contraceptive pills and the copper intrauterine device (IUD).

Emergency contraception pills are also known as the morning-after pill. Emergency contraception pills — such as Next Choice One Dose, Plan B One-Step and Ella — can be used up to five days after unprotected sex. However, the pills are more effective the sooner you take them.

Another option is a copper IUD (ParaGard). To prevent pregnancy, the IUD must be inserted within five days after unprotected sex.

Dec. 16, 2014