Hai if her cycles are regular if she has taken ipill with in 72hrs of unprotected intercourse chances of pregnancy are very less And with ipill there may be delay in the next cycle

Emergency contraception pills can delay and disrupt cycles Use proper contraception It should work Do a urine pregnancy test if you miss period by more than 4 days If negative wait for 10 more days Connect for more details and information here Go to my website Www.familygynaec.com For articles on contraception Blog section YouTube channel Dr Harita Kothia videos

Ipil is not an ideal contraception If periods are regular,  chance of pregnancy would be less during the days you have told