How does one differentiate between plan b and implantation bleeding?
Patient: I took plan b emergency contraceptive on Wednesday, 2 days after unprotected sex, which occurred on the third day of my period and my period stopped right after.  Now on Sunday, I woke up to a dark red, brownish spotting, is there a way to tell the difference betwen Plan B side effects and implantation bleeding? Doctor: Hello and welcome,I understand the issue however there is no way to tell the difference between bleeding due to Plan B and implantation bleed. However as the sexual episode was on day 3 of periods, the chance of pregnancy is zero. Also implantation bleed usually occurs about 8-10 days after the sexual episode while this has occured earlier. So it is most likely that the spotting is due to plan B.Hope this satisfies your query. Thanks for using HCM.     Feel free to ask any more questions that you may have. Dr Madhuri BagdeConsultant Obstetrician and Gynecologist