How long it’s been since you had unprotected sex — you have up to five days after unprotected sex to use emergency contraception. Plan B works better the sooner you take it. Plan B doesn’t work nearly as well after three days (72 hours). It’s better to take ella as soon as you can.
It is most effective if taken properly within 24 hours of unprotected sex. Plan B is less effective in women weighing between 165 and 176 pounds (75-80 kg) and not effective in women weighing over 176 pounds (80 kg). An IUD, inserted up to 7 days after unprotected sex, is recommended for women in this weight group.
Taking the morning- after pill — emergency contraception — more than five days after unprotected vaginal intercourse won’t have any effect. Emergency contraception — the morning- after pill — is effective if started within 120 hours, or five days. The sooner emergency contraception is started, the better it works.
Do I have to wait until the next day? You should take it as soon as possible. Emergency contraception (AKA the morning-after pill) works up to five days (120 hours) after unprotected sex. But the sooner you take it, the better it works.
The sooner you take Plan B ®, the more effective it is. It can prevent pregnancy if taken within 72 hours and preferably within 12 hours of unprotected sex. If you take it within 24 hours of unprotected sex, it is 95% effective. If you take it between 48 and 72 hours of unprotected sex, the efficacy rate is 61%.
How will I know Plan B ® worked? You will know Plan B ® has been effective when you get your next period, which should come at the expected time, or within a week of the expected time. If your period is delayed beyond 1 week, it is possible you may be pregnant.
It is not possible to prevent a pregnancy, using the morning after pill, more than five days after unprotected sex. If you are concerned that you may be pregnant, you can do a home pregnancy test from the first day of a missed period, or if your periods are irregular at least 21 days after unprotected sex.
Though emergency contraception isn’t meant to be used as primary birth control, it’s a good idea to have it on hand if you’re relying on the pull – out method.
It’s not common, but Plan B can lead to unexpected spotting and bleeding. According to the package insert, Plan B can cause other changes to your period, such as heavier or lighter bleeding or getting your period earlier or later than normal.
What if you take it twice in 2 days — will it make it more effective? Taking additional doses of an EC pill won’t make it more effective. If you’ve already taken the required dose, you don’t need to take an additional dose on the same day or the day after.
An estimated 0.6 to 2.6% of women who take the morning-after pill after unprotected sex will still get pregnant. What people know – and don’t know – about the morning-after pill has been brought into the spotlight after a Refinery29 writer shared her story of becoming pregnant despite taking emergency contraception.
Some reasons emergency contraceptive pills can fail include ovulation timing, BMI and drug interactions.
” If you wait too late, your body may release that egg before [ Plan B ] has the time to stop that release.”