If you have sex without proper contraception, it has been more than 72 hours, if you have intercourse during the safe period for more than 72 hours, the probability of pregnancy is not particularly large, at about 15%, and the probability of pregnancy without emergency contraceptive pills is not particularly large. After 12 days after the intercourse, go to the hospital to draw blood or use a pregnancy test to rule out pregnancy. If it is in the dangerous period of intercourse is possible pregnancy, but has been more than 72 hours, the remedy is to go to the regular hospital as soon as possible in the uterus placed in the copper ion birth control device, in the aftermath of the 3-5 days has a certain remedial effect, mainly to play a role in inhibiting the role of implantation.