There are several ways to postpone menstruation: 1. Taking progestins, such as progesterone and dydrogesterone, in the second half of the menstrual cycle is not recommended. The reason is that the time to take the drug is after ovulation, ovulation to menstruation, luteal phase time is relatively fixed, about 14 days to take the drug may not be able to prevent the onset of menstruation, the closer the drug is to the period, the more ineffective. 2, taking short-acting oral contraceptive drugs, commonly used are eusebio, daing-35, mafron. You need to start taking the pill at the time of your last period, i.e. day 1-5 of your menstrual period, and you can’t miss taking the short-acting oral contraceptives until you’ve finished dealing with the matter at hand. The onset of menstruation within 7 days of stopping the pill is more reliable and the medication used is safer, so there is no need to worry about the side effects of the pill.