Levonorgestrel tablets 2 tablets are known by the trade name Yutin and are emergency contraceptives, which are highly effective progestins. It is taken clinically without contraceptive measures, and 1 tablet is taken within 72 hours after intercourse, and then 1 tablet is taken again 12 hours later. Since Yutin is a highly effective progestin, if taken orally during the first half of the menstrual period there may be withdrawal bleeding, that is, a small amount of vaginal bleeding will occur about 3-5 days after stopping the pill. If taken orally during the second half of the menstrual period, there is not much chance of withdrawal bleeding, but it is not a contraceptive failure. Emergency contraceptive pills are not clinically recommended to be taken orally as a last resort.