The emergency contraceptive pill is to be taken orally within 72 hours after intercourse, the earlier it is taken the better the effect and the higher the success rate of contraception. Two hours before and after taking the emergency contraceptive pill, an empty stomach is required to avoid gastrointestinal reactions and vomiting caused by the drug, which can affect the effectiveness of contraception and increase the incidence of contraceptive failure. The hormonal content of the emergency contraceptive pill is eight times higher than that of the short-acting pill, so it is not recommended to take it several times orally because the most common side effect of the emergency contraceptive pill is to cause menstrual disorders, and if it is taken more than three times a year, the chances of menstrual disorders increase greatly. It is recommended that women who do not have the requirement to have children should take contraceptive measures in advance, such as male condoms, short-acting pills and intrauterine devices.