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if i experience dark brown bleeding 5 days after taking plan b and it has been going on for 3-4 days, is that an indication that i am not pregnant?
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replied June 17th, 2011

Welcome to ehealthforum

Plan B is an emergency contraceptive pill and since it contains high doses of hormone it can cause breakthrough bleeding,nausea,vomitting,delayed next period etc.
Though it is quite effective in pregnancy prevention but 1 to 2% chances of failure are present.
Your next period might be delayed by a week.But if they do not start even after 10 days of expected date consider visiting a Gynaecologist for evaluation.

Take Care!

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