Emergency contraceptive pills are remedies for contraceptive failure and should not be used casually. Because it contains a large amount of progesterone, it can lead to menstrual disorders and ovarian dysfunction. Generally, it should not be taken more than 3 times a year, and not 2 times a month. Taking emergency contraceptive pills 10 times a year interferes with the normal secretion of estrogen and progesterone function of the ovaries, which may lead to ovarian hypofunction or premature ovarian failure. The ovaries cannot normally secrete estrogen and progesterone and regulate menstruation, causing menstrual disorders, ovarian ovulation dysfunction and infertility. Usually take short-acting contraceptive pills, the hormone content is small, 21 days a month, can be taken for a long time, or the use of condoms to prevent pregnancy, the damage to the body is lighter.