The pill is 99.7% effective with perfect use, resulting in less than 1 out of 100 women getting pregnant in one year. However, typically nobody uses it perfectly, making the effectiveness of the pill drop to about 91% — that means about 9 out of 100 pill users get pregnant each year. If you often miss or forget the pill, chances are, you might get pregnant.
If you want a method that’s even more effective at preventing pregnancy, you might want to check out IUDs and the implant. But if you prefer taking the pill, make sure you always take your pills on time, so they work as well as possible.
A birth control app or a set reminder on your phone can help you achieve the maximum effectiveness. But even if you take your pills correctly, there’s small chance that you could still get pregnant.