Yutin is a commonly used emergency contraceptive pill, a box generally has two tablets, Yutin contains levonorgestrel 0.75mg, is a single progestin preparation, can change the endometrial morphology and function, so as to play the role of contraception. The way it is taken is to take one tablet within 72 hours after intercourse and repeat one tablet in 12 hours, which has a high success rate of contraception. Another type of emergency contraceptive pill is mifepristone, which can be taken within 120 hours after intercourse, and each pill contains 25mg of mifepristone. The emergency contraceptive pill is only effective for one unprotected sexual intercourse and has a certain failure rate and side effects, so it is not recommended. Currently condom contraception is a safer and more effective method.