Yutin, also known as levonorgestrel tablets, is an emergency contraceptive pill that can play a contraceptive role by inhibiting ovulation or preventing the fertilized egg from taking a pill within 72 hours after intercourse. The earlier the contraceptive effect after intercourse, the better, in the two hours before and after taking the drug, it is best to fasting, water, to ensure the absorption of the drug, a small number of women may be nausea, vomiting and other gastrointestinal reactions, if vomiting, can not ensure the absorption of the drug will make the contraceptive effect greatly reduced. Yuktin contraceptive effect success rate between 80%-90%, as Yuktin contains a large number of hormonal components, it is best not to take more than three times a year, otherwise it is easy to appear menstrual disorders. It should be noted that taking the pill is only the contraceptive effect of the current intercourse, if you have intercourse again, you need to take effective contraceptive measures.