There is no contraceptive effect if you have intercourse immediately after taking the emergency contraceptive pill. Emergency contraceptive pills only have a contraceptive effect on the last sexual intercourse, but not on the next sexual intercourse, so after taking emergency contraceptive pills, and then have sex again, there is a possibility of pregnancy. If you don’t intend to get pregnant, you need to take the pill again to prevent pregnancy. Emergency contraceptive pills can only be used as a remedy after sex, not as a regular form of contraception. If you take emergency contraceptive pills frequently within a short period of time, it may cause menstrual irregularities. Emergency contraceptive pills should not be taken more than three times a year. Vaginal bleeding will occur within 7-10 days after taking the pills, suggesting that the contraceptive is successful, and this bleeding is equivalent to the onset of a woman’s menstrual cycle. After taking the pill, if there is no vaginal bleeding at the time of menstruation, and the menstruation is delayed, then you need to go to the hospital for examination to see if you are pregnant.