emergency contraception
"I took Ella One approximately 8-9 hours after unprotected sex. It was around the time I was meant to ovulate, so naturally I was very concerned. There were no significant side effects in my case, only mood swings in the first day or two (can't say whether this was the pill or just me!). My period, however, arrived a few days late (4-5 days), so I took a pregnancy test in the meantime and it was negative. 
All in all, I fully recommend Ella One as a convenient and highly effective solution in emergencies."