Emergency contraception is a progestrone called Levonorgestrel. This has to be taken within 72 hrs of unprotected sex.Basic side effect is irregular bleeding, therefore possibilities of delay by 6 days or it has come early. If patient takes emergency contraceptive in 4th or 5 th day of period then cycle will come within a week.Bleeding can happen in 1 week and repeat bleeding after 1 more week.Patient may have no bleeding as this was not required hence cycle can be delayed by 3 or 4 weeks. there is no relation to menses which was delayed 6 days now as compared o last time.Emergency contraception should not be taken for regular contraception , if taken regularly this will cause irregular bleeding.

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