You can delay your menstruation through medication. The medicine used is known as norethisterone 5mg which you should take one tablet three times a day. You should start taking the medicine three days before the day you are expecting your periods to begin.
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To delay menstruation you can consider taking a combined oral contraceptive pill by taking two packets of pills back to back. This however, has to be done with consultation from a doctor. This practice has side effects like breakthrough bleeding, bloating and stomach pains. Some prescribed medication called norethisterone is also used to delay your period.