It is possible to get pregnant after taking emergency contraception. Though the morning after pill decreases the likelihood of getting pregnant, it’s not always effective.
How Effective Is the Morning After Pill?
The morning after pill is about 95% effective when taken within 24 hours of having unprotected sex or a birth control mishap. The effectiveness of Plan B One-Step decreases to about 89% 72 hours after having sex. Plan B One-Step is only effective when taken within three days of having sex. Ella is as effective as Plan B during the first 24 hours and maintains its effectiveness for up to five days after having sex.
How Does the Morning After Pill Work?
The morning after pill prevents pregnancy by stopping ovulation. It may also interfere with a fertilized egg implanting in the uterus. However, this is not an abortion pill and will not work if you’re already pregnant. It is not guaranteed to prevent pregnancy, particularly if you have already ovulated before taking the pill.
How Do I Know if the Morning After Pill Worked?
You should get your period within a month of taking the morning after pill. In rare cases, emergency contraception can make your period late by as much as a week. If you are more than seven days late, you should take a pregnancy test.