Chances of getting pregnant if he pulls out?

There is a risk of pregnancy with any type of unprotected sex, including withdrawal (also called the pull-out method).

Although withdrawal as a birth control method is generally thought to be effective if done correctly and every time, in reality, it can be difficult to always pull out in time. Withdrawal fails about 22 out of 100 times over a year, making it a quite ineffective form of birth control. For this reason, it's important to use a more reliable method of birth control, such as condoms, to reduce the risk of unwanted pregnancy.