If done correctly the pull out method has a higher success rate. However it is a bad idea to use it around the time that you are ovulating. If he didn't pull out in time, happened to have sperm in his pre ejaculate, or go any on her vagina at all then she runs a risk of being pregnant. Remember though that sperm introduced into the vagina during ovulation isn't a guarantee of pregnancy. Each women only has a 25-30% chance of getting pregnant. If she doesn't want to be pregnant and it has been less than 72 hours since she can take the Plan B pill. I how she gets the results she is hoping for.