Pregnancy after Plan B

The only kind of contraceptive that is one hundred percent effective is abstinence. When it comes to emergency contraceptive pills such as Plan B One Step, you cannot rely completely upon its effectiveness in preventing a pregnancy from occurring. When taken as recommended – which is within 72 hours after an act of unprotected sex – it has been found to be about 92% effective. The sooner after intercourse that Plan B One Step is administered the better, and most effective, but even if taken immediately afterwards it is not a guaranteed pregnancy prevention method.

What Could Cause Plan B Failure?

There are a few ways that the effectiveness of the Plan B One Step emergency contraceptive may be reduced.

  • If you wait too long to take Plan B One Step it will not have the opportunity to prevent an egg from being released, prevent a sperm from entering the cervix or prevent implantation in the uteran wall. In order for Plan B One Step to have the best chance of completing its mission of pregnancy prevention it must be taken as soon as possible after unprotected sex – and no later than 72 hours afterward.
  • Vomiting within 2 hours of taking the Plan B One Step pill means it did not have the chance to get into your bloodstream and perform its work. Do what you can to control your nausea, and if you do vomit, contact your physician to find out if you should repeat the dose.
  • A subsequent act of unprotected sex is not “covered” by Plan B One Step for any length of time. If you have unprotected sex and then take Plan B, the next time you have sex you have to use protection.
  • You may have already ovulated, which means Plan B could not prevent the egg from being released and even further reducing the possibility of preventing the sperm from fertilizing it.
  • You may have already been pregnant without realizing it yet. PLAN B DOES NOT CAUSE AN ABORTION. If an embryo is already implanted in your uterus then Plan B One Step will have no effect at all.

What Should I Do After I Take Plan B?

  • Make sure to use adequate birth control protection the next time you engage in sexual intercourse.
  • Try not to vomit! Nibble crackers, drink coca-cola, take an anti-nausea pill… Just do whatever you can to prevent throwing the pill back before it gets to work.
  • Pay close attention to potential pregnancy symptoms. If you don’t get your period within one week of its normal date, then take a pregnancy test.

And What If I Do Get Pregnant After Taking Plan B?

You’ll have the same options as if you had never taken the emergency contraceptive pill. There is no medical evidence that Plan B One Step will have any negative effect on a developing fetus, so you do not have to fear fetal abnormalities.

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