Yutin is a kind of emergency contraceptive pill, contraceptive effect is relatively long, taken within 72 hours after the incident, can be very good to prevent the fertilization of the egg to bed. However, this kind of drug has certain side effects, which will affect the normal hormone level secretion and cause damage to the liver and kidney function. Therefore, it is not recommended to take it more than twice a month or three times a year. There are other methods of contraception, such as intrauterine device, oral short-acting contraceptive pills, wearing condoms, etc., which have relatively fewer side effects.