High: Prime time for ovulation is day 10-14 after start of menstrual period (thus first day of bleeding is day #1). Thus if you had sex on day 7, and day 8, and sperm can live for up to 3 days, then the chances of pregnancy are higher than average. Any active of intercourse for someone your age carries about a 20% chance of pregnancy, if that helps.
Answered 12/14/2013
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