Barrier methods are a type of contraception that prevent sperm from fertilizing an egg by creating a physical barrier. Some common barrier methods include condoms, diaphragms, cervical caps, and contraceptive sponges. These methods are highly effective when used consistently and correctly, but they do not protect against sexually transmitted infections. Alternative terms for barrier methods include barrier contraception, physical contraception, and obstacle methods. Whatever term you use, it's important to discuss your options with a healthcare provider to make an informed decision about the best contraceptive method for you.