Can pregnancy happen as the follicle ruptured after an IUI? I have 21×18mm follicle on the 15th day and I got pregnyl 5000 on the same day in evening about 7:00 pm. IUI on the 16th day in evening about 7:30pm and having unprotected sex on from 17th day.i started rupture pain in early morning on 17th day..then I undrgone Ultra Sound on the 17th morning and the doctor says my follicle already ruptured. How many percent chance to get pregnant