Barrier Methods - GCSE Biology Definition

Barrier methods are contraceptive techniques that prevent pregnancy by creating a physical barrier between sperm and the egg, preventing fertilisation. Common examples include male condoms, which cover the penis, and female condoms, which are inserted into the vagina. Both of these condoms also reduce the risk of sexually transmitted infections. The diaphragm and cervical cap are other barrier methods, placed over the cervix to block sperm from entering the uterus. These methods are generally used in combination with spermicide to increase their effectiveness. Barrier methods are non-hormonal, making them a preferred choice for those who wish to avoid hormonal contraception. These methods are covered in human reproduction and sexual health in GCSE Biology.