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How effective is the morning after pill

The Emergency Contraception Pill (‘morning after pill’) is much more likely to work if you take it within 24 hours of having unprotected sex (95-98% effective) but effectiveness decreases the longer you wait.

There are two types of hormonal emergency contraception pills; Levonorgestrel which has to be taken within three days of unprotected sex, and the Ulipristal acetate, to be taken within five days.

Ulipristal acetate has been found to be slightly more effective than Levonorgestrel, but can prevent other types of hormonal contraception from working for a week after use.

Although emergency contraception pills are the most popular method of emergency contraception, the non-hormonal coil (IUD) is the most effective emergency contraception if inserted up to five days after unprotected sex.

Learn more about emergency contraception

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