How effective is withdrawal when used correctly compared with typical use?

The failure rate for coitus interruptus—commonly known as the withdrawal method—varies significantly based on how it is practiced. When performed correctly, the failure rate is approximately 4 percent; however, with typical use, the failure rate increases to more than 20 percent.1

The method's reduced reliability in typical practice is largely due to the difficulty of consistent execution, as it does not account for drops of seminal fluid that may be released before full ejaculation occurs. While it is an ancient and widely practiced form of birth control, it is generally considered less reliable than modern hormonal contraceptives or barrier methods used in conjunction with spermicides.21