There are short-acting oral contraceptive pills and emergency contraceptive pills. If the short-acting oral contraceptive pill, the side effects of the drug are relatively high, it is a highly effective progestogen and cannot be applied more than three times a year, and can only be taken once a month. This drug cannot be applied as a regular contraceptive measure, and taking too much of it can cause excessive menstruation or endocrine disorders, which can cause non-pregnancy. If the pill is a short-acting oral contraceptive pill, it is very harmful to the body and has no significant side effects, and the success rate of contraception can reach more than 99% when taken for 21 days a month. If there is no fertility requirement, this drug can be used for a long time.