My wife's period cycle starts from 21st of the month. Last month she had period on 21st Oct, 2016.we are on tour now and she wants to delay the period cycle by 3-4 days as we will return to home on 25th Nov, 2016.so we purchased regestrone 5 mg tablet for this. But as we have tried for baby this month, so not sure whether she will conceive, but if she conceive then does the medicine regestrone 5 mg impact her pregnancy? So if it impacts and we need to avoid the medicine, how will we delay period cycle by 4-5 days. Please advise as we are really worried for the same.