If i have unprotected sex with a woman on birth control. and she stops birth control 5 days after sex. what are the chances of her getting pregnant?

Low if true: With such a story I would wonder if she was on BC at all, or was inconsistent in use making it less effective. The pill has a failure rate around 5%/yr in general.If she was consistent with use and stopped 5 days after your encounter, any sperm you left in her would be dead by the time an egg could be released and make it into position for conception.