Not Following Instructions: Condoms are a good example of how this can lead to birth control failure. It’s important to make sure a condom fits correctly, for example, and to be careful when removing it. Whatever type of birth control you use, make certain you know how to use it. Forgetting or Choosing Not to Use It: Let’s say you’re on birth control pills. It goes without saying, if you keep forgetting to take them or feel that it will be OK “just this once” to skip a pill, you’re setting yourself up for unintended pregnancy. Create a fail-proof routine for popping your pills—store them next to your toothbrush so you’re reminded every morning or switch to a contraceptive that you don’t have to deal with on a daily basis, such as an IUD or implant.
Of course, it’s not always possible to know right away if your birth control has failed. The possibility will only come up if you or your partner’s period is late. In that case, take a home pregnancy test right away. You’ll have your answer sooner rather than later and will know what to do: Relax if it’s negative, or see a doctor confirm if you really are pregnant.