The effectiveness of oral emergency contraception after 2 unprotected sexual intercourses is determined by whether the first sexual intercourse was more than 72 hours before the pill was taken. Theoretically speaking, if no effective contraceptive measures are taken, the emergency contraceptive pill should be taken immediately after the first intercourse. If you don’t take the pill in time after the first intercourse, and then have another intercourse, then if the distance from the first sexual intercourse is not more than 72 hours, it is relatively effective, and the earlier you take it, the better the effect. However, if the interval has been more than 72 hours, then at this time to take the pill has a certain chance of contraceptive failure. It should be noted that emergency contraceptive pills should not be taken more than 3 times a year, and not more than 1 time in January to avoid side effects. If there is no intention to get pregnant, it is best to choose condoms, short-acting contraceptive pills and other safer contraceptive measures.