Contraceptive pills are divided into short-acting contraceptive pills, long-acting contraceptive pills and emergency contraceptive pills, and the contraceptive success rates of different contraceptive pills are different. The contraceptive success rate of short-acting and long-acting pills can reach 95% or even more than 95%. These contraceptives have passed a long time verification in the process of use and can be used if the physical condition allows. The emergency contraceptive pill is an emergency contraceptive method taken within 72 hours after sex. Among all the contraceptive methods, the emergency contraceptive pill has the lowest probability of contraceptive success, probably only about 85%-90%, and the emergency contraceptive pill also has obvious effects on women’s endocrine, menstruation and so on, so it is not recommended for regular use, and it is recommended not to use it more than twice a year. It is not recommended to use it more than twice a year. You should also choose a regular and correct contraceptive method to avoid unwanted pregnancy.