Taking the emergency contraceptive pill again during the safe period will increase the chances of contraceptive success. Because the safe period is not necessarily safe, some people may also cause ectopic ovulation during the safe period due to their mood and environment. If you simply take the emergency contraceptive pill, it may cause contraceptive failure. If you take the pill during the safe period, the success rate of contraception will be significantly higher, but it will cause irregular vaginal bleeding or endocrine disorders, so the pill should not be used as a regular contraceptive measure, and there is a risk of delayed or early menstruation. This pill can only be taken once a month, not more than three times a year, and too much of it can cause menstrual disorders.