Can you still get pregnant after taking Plan B?
The morning-after pill, sometimes referred to by brand name Plan B, is a levonorgestrel emergency contraceptive (EC) pill that prevents pregnancy after unprotected sex or if your contraception failed (like if you forgot to take your birth control pills or the condom broke). It works by stopping an egg from being released from the ovary during ovulation, which prevents the egg from being fertilized if ovulation has already happened or prevents a fertilized egg from being implanted in the womb.
There are many brands of levonorgestrel EC pills that work in the same way. This type of EC works best when taken as soon as possible after unprotected sex, ideally within 12 hours.
When taken within 24 hours, levonorgestrel EC is 95 percent effective. If taken 48–72 hours after unprotected sex, the Plan B effective rate is 61 percent. The effectiveness of Plan B decreases the longer you wait, so taking it sooner is better!