What is the primary function of a diaphragm in contraception?

The primary function of a diaphragm in contraception is to block sperm from entering the uterus. This barrier method is designed to fit snugly over the cervix, which is the opening to the uterus, effectively preventing sperm from reaching an egg and fertilizing it. By physically blocking the passage, the diaphragm plays a crucial role in preventing pregnancy.

While preventing ovulation is a mechanism associated with hormonal contraceptives, a diaphragm does not influence the hormonal cycle. Additionally, it does not provide protection against sexually transmitted infections (STIs), which is the function of other methods like condoms. Lastly, while some individuals may experience enhanced pleasure when using certain barrier methods, enhancing sexual pleasure is not the primary design or function of the diaphragm in terms of contraceptive use.