Yutin is an emergency contraceptive pill, which may cause menstrual disorders, delayed menstruation or even amenorrhea after oral intake. Yutin is a high-dose progestin, which may inhibit ovarian function after taking it, so it can lead to menstrual disorders. Emergency contraceptive pills should not be used as regular contraception if you do not want to have children. Emergency contraceptive pills should not be taken all the time, and it is best not to take them more than 3 times in a year. If the menstrual period is delayed after taking Yutting for more than 1 month, you can take progesterone orally to induce menstruation, however, the prerequisite is to rule out pregnancy before taking progesterone. If the progesterone is discontinued for more than 10 days without menstruation, it is necessary to check the sex hormone six to see if the estrogen is low.