The emergency contraceptive pill is only effective for sex without contraception before taking the pill, but not for sex after taking the pill, and taking the emergency contraceptive pill does not provide 100% contraception.
If a woman does not take proper precautions during intercourse, she can take the emergency contraceptive pill within 72 hours after intercourse to achieve the effect of contraception. Generally speaking, the emergency contraceptive pill is only effective for sexual intercourse without contraception before taking the pill, but not for sexual intercourse after taking the pill, and it is possible to get pregnant accidentally after taking the pill.
However, the emergency contraceptive pill is not able to achieve 100% contraception, after taking the emergency contraceptive pill there is also the possibility of pregnancy, and after pregnancy is likely to have an impact on the development of the fetus, fetal deformities and so on.
If a woman does not need to get pregnant, it is recommended that she take good contraceptive measures during intercourse and try not to take emergency contraceptive pills.