Barrier contraceptive effectiveness

Barrier contraceptives, such as condoms and diaphragms, work by preventing sperm from entering the uterus and reaching an egg. Their effectiveness depends on correct and consistent use. When used perfectly every time, they have a high success rate—around 98%—meaning very few women will become pregnant. However, with typical use, which accounts for human error, the effectiveness drops to about 85%. They also provide protection against some sexually transmitted infections. Proper use includes correct sizing, handling, and consistent application before intercourse.