Taking emergency contraceptive pills twice a month is very harmful to the body. Because the amount of estrogen and progesterone of emergency contraceptive pills are relatively large, an emergency contraceptive pill is equivalent to eight ordinary contraceptive pills, contraceptive pills to eat twice will cause menstrual disorders, early menstruation, irregular vaginal bleeding, some people because of emergency contraceptive pills will also cause amenorrhea. Therefore, the role of emergency contraceptive pills is only in the near-ovulation period, no protection measures for sex, eat once as a remedy, can not be used as usual contraceptive measures. Emergency contraceptive pills should not be taken more than three times a year, and frequent use will cause endocrine hormone secretion disorders, affecting ovulation. Therefore, emergency contraceptive pills should be taken with great caution, only to observe the menstrual situation, if there is any problem, go to the hospital for examination in a timely manner.