There are various ways to delay menstruation, and the main methods at present are taking birth control pills and taking progestin analogs. 1. Taking birth control pills: start taking birth control pills 2-3 days before the onset of menstruation, which mainly include drospirenone ethinyl estradiol tablets and so on. It should be taken regularly as prescribed by the doctor. Continue to take until 3-5 days before the onset of menstruation can stop. 2. Taking progesterone analogs: Currently, the main progesterone analogs, such as progesterone, are taken once a day on the 14th day of the menstrual cycle until 3-5 days before the planned menstrual period. It is also recommended not to change the own menstrual cycle and to take the medication under the advice and guidance of a medical professional.