In a new study by researchers at Duke University, the most-effective method of birth control was found to be IUDs and implants under the skin.
Less than 1% of women using one of those methods of birth control got pregnant, and both require implantation by a doctor.
Birth-control pills and patches were the next most-effective methods of preventing pregnancy, failing 2-9% of the time.
Condoms and diaphragms failed up to 15-24% of the time, mostly because people did not use them properly.
The worst method of birth control was found to be "pulling out," also known as withdrawal, which failed 18-28% of the time. In the study, 31% of women tried using it as a birth-control method in the past two years.