After taking emergency contraceptive pills, it is best to wait 3 months before considering pregnancy. This is because the clinical contraceptive mechanism of emergency contraceptive pills can inhibit ovulation and change the thickness of the uterine lining, so that the uterine lining is abnormally thickened, which prevents the fertilized egg from achieving the purpose of contraception. After the ovaries are inhibited from ovulating, the natural pattern will be broken, so after taking emergency contraceptive pills, in the short term, it may cause disruption of the menstrual cycle, and it is recommended to consider pregnancy after 3 months. In addition, the quality of the eggs will be better after the ovaries have been suppressed from ovulation and then resumed ovulation, preferably after 3 times of resumption of ovulation.