There is no contraceptive effect when you have sex after taking the emergency contraceptive pill. The emergency contraceptive pill only has a contraceptive effect on the previous sex, but not on the next sex. Therefore, if you have sex after taking the emergency contraceptive pill, there is a possibility of pregnancy. If you have no intention of getting pregnant, you need to take the emergency contraceptive pill again in order to have a contraceptive effect. The emergency contraceptive pill can only be used as a remedy after sex, not as a regular form of contraception. Frequent use of the emergency contraceptive pill within a short period of time may cause menstrual disorders. Do not take the emergency contraceptive pill more than 3 times in a year. Vaginal bleeding within 7-10 days after taking the pill indicates successful contraception, and this bleeding is equivalent to menstrual flow. After taking the pill, if there is no bleeding at the time of menstruation and your period is delayed, you need to go to the hospital to check if you are pregnant.