What are the chances of pregnancy if my fiance uses the pull out but we have intercourse twice without him urinating?

Up to 30% per cycle.: Your description essentially sounds like no contraception was used. Based on your young age and provided neither of you is using medical contraception, you may have a 25-30% of conception this cycle (if vaginal intercourse occurred within +/- 5 days from your ovulation (i.e. 9-19 days from the first day of your last mentrual period). Take Folic Acid 1-5 mg daily and best of luck!