<s>[INST] I and my partner had sex two days before,and my periods date is on 30.both the time he realised his pricum will come so he removed the penis n his pricum was expelled out not inside my vagina.still i took i-pill in the evening 7.30 i.e appx near 12hr soo now m doubtfull about geting pregant [/INST] Hello and Welcome to ‘Ask A Doctor’ service.  I have reviewed your query and here is my advice. Chance of pregnancy is very less as you took I pill within 12 hour of sex. It is highly effective in preventing the pregnancy (95-98% success rate). So it has just 0-5 % failure rate. But I pill can cause earlier period, delayed period by 1 to 2 week and heavy bleeding. So do not worry if period will delay by the 1 to 2 week. Avoid stress, take healthy diet, drink plenty of water and do regular exercise.Hope this may help you. Contact further if follow up needed.Best regards,Dr. Sagar </s>