IUI question

Li
How long does the sperm last inside the uterus once it's been inserted ?!
Day 10: lh from blood work 10
Day 11: lh from Blood work 20.1, negative on LH surge for Okp test 
Day 12: IUI
Day 13: lots of tacky cm
Day 14: signs of ovulation (sore boobs, dry cm)
Nervous inoculated day 13 and not on day 12