Emergency Contraception

Reviewed/Revised May 2023
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What is emergency contraception?

Emergency contraception is birth control (something used to prevent pregnancy) that you use after you've had sex. You can use it if you have sex without birth control or if your birth control fails, such as when a condom breaks.

There are 2 main types of emergency contraception:

  • Medicines ("morning-after pills")

  • Getting a copper IUD (intrauterine device) inserted in your uterus

These methods are called "emergency" because you should be using another method to keep from getting pregnant. You shouldn't depend on doing something after you have sex.

  • Use emergency birth control as soon as you can after sex to avoid getting pregnant—the sooner you use it, the greater the chance it will work

  • You can get several different types of medicine that work as emergency contraception pills

  • Putting in a copper IUD is the most effective form of emergency birth control and will continue to prevent pregnancy for up to 10 years (or until you have it removed)

What are the types of emergency birth control?

Pills are more commonly used as emergency birth control, but a copper IUD works better and provides ongoing birth control.

Medicines for emergency contraception (morning-after pills)

These are pills you take soon after sex to avoid getting pregnant.

There are several different kinds of morning-after pills:

  • Combination oral contraceptives (birth control pills), available with a doctor's prescription, can also be used but sometimes cause nausea and vomiting

Copper IUDs

A copperIUD is a small T-shaped plastic device wrapped in copper wire that is placed in your uterus (womb) to prevent pregnancy.

  • Your doctor must put in the copper IUD

  • You must have it put in within 5 days of having sex

  • The IUD can be left in as birth control for up to 10 years

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