On Decemeber 13 me and my girl friend stated having sex. We kind of got into the habbit of her getting me hard then i would go in her vagina unprotected for 10 to 15 thursts, then I would pull out and put a condom on and we would then both finish.(i was never close to coming when we where unprotected so i dont know if there was any precum, and i would always put on a condom when i would finish)She started her last cycle on December 24 and she usually goes about 40 days bettween cycles. What are the chances of her being pregnat?