How emergency contraceptive pills work
Emergency contraceptive pills work to prevent pregnancy after unprotected sex by postponing ovulation, if it has not already happened. This means that the sperm waiting in the fallopian tubes will be unable to meet an egg and fertilise it. This is similar to regular contraceptive pills, which also work by preventing egg release.
Emergency contraceptive pills are not 100% effective. There is a chance that you may have already ovulated when you take an emergency contraceptive pill. Taking emergency contraceptive pills as soon as possible after unprotected sex gives you the best chance of success.
The sooner you take emergency contraceptive pills, the better
- Emergency contraceptive pills are not 100% effective.
- ellaOne® is a morning after pill and is still effective even when you are about to ovulate – which is when risk of pregnancy is highest. It is not an abortion pill.
- The sooner you take emergency contraception after unprotected sex, the better the chance of successfully postponing ovulation and avoiding pregnancy.
If you want to have sex after using an emergency contraceptive pill, use a condom even if you are taking a regular contraceptive pill until your next period.
Emergency contraceptive pills will not protect you from pregnancy if you have further unprotected sex
If you want to have sex after using an emergency contraceptive pill, use a barrier method of contraception until your next period.