I took a single dose of postinor 2 on the 11th day of 21 days cycle due to condom failure. how sage am i?

Timing: The effectiveness of emergency contraception is mostly correlated to the amount of time that passes between having the unprotected intercourse and taking the pill. The faster you take the pill, the more likely you are to prevent ovulation. Thus has much higher efficacy taken immediately after versus 2 days later. Taken within 72 hours has between 42-88%, depending on when you took it.