Postponement of menstruation has the following methods: 1, the second half of the menstrual cycle to take progesterone, such as progesterone, dydrogesterone, this method is not recommended. The reason is that the time to take the drug after ovulation, ovulation to menstruation, luteal phase time is relatively fixed, 14 days or so to take the drug may not be able to prevent the onset of menstruation, the closer the drug is to menstruation, the more ineffective. 2, taking short-acting oral contraceptives, commonly used are Yosmin, Daying-35, MaFuLong. You need to start taking the pill at the time of your last menstrual period, i.e., start taking short-acting oral contraceptives on the 1st-5th day of your menstrual period and not miss a dose, and keep on taking them until you are done with the matter at hand. The onset of menstruation within 7 days of stopping the pill is more reliable, and the drugs used are safer, so there is no need to worry about the side effects of contraceptives.