Typical with Plan B: Plan b essentially disrupts the normal menstrual cycle by blocking or delaying ovulation. That it is how it works and why it is so different than a medical abortion. Irregular bleeding after taking Plan B is not rare. Always check a pregnancy test after using Plan B and see a doctor for birth control. You may not know if it's Plan B bleeding or your cycle because the cycle was disrupted.
Answered 8/22/2015
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