Yutin is among the most commonly used emergency contraceptives, and because it is a high-dose progestin preparation, after taking it does$$ may produce side effects that last for more than 1 week or so. If a woman is taking Yuktin multiple times for contraception and is taking it for a short period of time, then the side effects of Yuktin last longer possibly 3 months or even longer. Because after taking Yutin many times, it will affect the ovarian endocrine function of women, resulting in abnormal ovulation, thus causing disruption of the menstrual cycle, and seriously affect the reproductive function of women. If the common gastrointestinal reactions occur after taking Yutin, but the duration of the reaction is usually relatively short, may be in 2-3 days will naturally alleviate, because the side effects of Yutin is relatively large, so can not be taken as a regular contraceptive pill.