Hello and welcome to `Ask A Doctor` service. I have reviewed your query and here is my advise. * Utovlan is a prescription drug containing Norethisterone, when consumed delay periods for desired period of times. * Ideally it should be started 3 days prior to the onset of menses. * As in your case, menses is already started still you can consume it from the same day itself to be taken once daily without failure upto the time period you want to delay the menses. Hope you have a fine holiday. Thanks.