How effective is withdrawal at preventing pregnancy?

<p>If you or your partner pulls out perfectly every single time, meaning that no semen whatsoever gets in your vagina or on your vulva, then withdrawal is 96% effective. That means that on average, 4 out of every 100 people using the withdrawal method will get pregnant over the course of a year. </p> <p>In practice though, the withdrawal method is one of the hardest methods to use correctly, so with the way most people use it, it's only 78% effective. That means that on average, 22 out of every 100 people using the withdrawal method will get pregnant in a year. </p>