Emergency contraceptive pills are hormonal pills that can cause changes in endocrine hormones in the body, which may lead to prolonged menstrual irregularities and even withdrawal bleeding, and should not be taken more than 3 times a year or 2 times a month. Frequent oral intake may interfere with endocrine hormones in the body and cause endocrine hormone disorders, such as increased prolactin and decreased progesterone results, and may cause polycystic ovary syndrome. Therefore, it is important to be strict when performing oral administration, and try not to exceed 3 times a year. If by that time there is cycle disruption, it will take a long period of oral medication to help the uterus return to normal. If contraception is needed, try to take condom contraception, which is not harmful to the body.