Taking emergency contraceptive pills twice in a month may cause side effects such as dizziness, nausea, vomiting, early, or delayed menstrual cycle, irregular vaginal bleeding, and inhibition of ovulation. Frequent consumption within a short period of time may even lead to difficulties in conception, menopause, due to its progesterone content is eight times that of ordinary short-acting contraceptives, easy to interfere with the state of endocrine balance in the body, the maximum number of times a year can only be taken once a month can not be more than once a month, in the absence of safety precautions in the situation of a remedial method. It can not be used as a regular contraceptive pill, and if you have sex again after using the pill, you need to take other effective contraceptive measures. Safer and more reliable contraceptive methods include the use of condoms, regular use of short-acting contraceptive pills, temporary no pregnancy plan can be on the birth control ring, do not recommend the use of extracorporeal ejaculation, safe period and other methods of contraception.