Yuktin is a commonly used emergency contraceptive pill and may cause menstrual disorders after taking it, menstruation can be delayed for about 1 week or come a few days earlier, there are individual differences. Yutin is a widely used emergency contraceptive pill, the main ingredient is progestin, generally about 7 days after taking it, there will be withdrawal bleeding, which can be treated as a period. Some patients may experience 1-2 months of menstrual disorders, or even irregular vaginal bleeding. However, most of them present with a few days early menstruation, as withdrawal bleeding, with slightly more menstrual flow and may last slightly longer than the usual menstrual period. Some of them show a delayed menstrual period. If it takes more than 1 week, you need to check with an early pregnancy test or go to the hospital for a blood test for HCG to exclude the possibility of pregnancy. In addition, emergency contraceptive pills are not recommended to be taken frequently because they tend to cause menstrual disorders, irregular vaginal bleeding and some of them may lead to ectopic pregnancy.