What are the chances of becoming pregnant if a woman has sex after her ovulation period?

Okay, so I'm curious... a woman's egg is released for fertilization ONLY ONCE a month in order to meet up with a sperm cell and become fertilized (get pregnant), and lives up to no more than 24 hours. A man's sperm cell can live for up to 7 days. My question is >>> if a woman has UNPROTECTED sex (and the man ejaculates inside of her), let's say, 3 days (72 hours) - or a week, for that matter - after she ovulates... what are the REAL chances of becoming pregnant?
Asked Dec 14, 2014

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