There are several ways to delay the onset of menstruation in women: 1. Progestin-based medications can be administered, such as progesterone injections or dydrogesterone, about 5-6 days before the normal menstruation. During the medication period, menstruation will not come, and when the medication is stopped for about 5 days, it will make menstruation come, thus playing the role of delaying menstruation. 2. Short-acting contraceptives such as Daing-35 and Eusebio can also be given for treatment, and the medication is also taken 3-5 days before menstruation, and taken once a day. While taking the drug women will not cause the onset of menstruation, when the drug is stopped about 5 days after the onset of menstruation. Taking these drugs that cause women to delay their periods is fine for occasional use, but if taken regularly it may cause women to experience nausea, vomiting, loss of appetite, headaches, irregular periods, etc.