My friend faced an incident where accidentally her partner's sperm ejaculated on her undergarments. She washed off her genitals aftersome time. Her period date was 15th march. She took ipill on 7th of march within 24hrs of incident. She also told me that her period used to be very irregular earlier also.. And this time its 7days delay.. Is this because of ipill?? Was she in ovulation phase?? Please give us a detail enquiry.. Please.