"my girlfriend and i had to use this contraceptive twice. both times it worked! i&#039;m only a teenager so this was very important because i didn&#039;t have the money to support a baby nor did she. it was a very grueling month waiting for her period to come but it did. her period did come about 4 days late. but if you do take it within the time, i had her take it 30 minutes before both times and it should be bound to work."