What is the purpose of a diaphragm in birth control?

The diaphragm serves as a barrier method of contraception, designed specifically to block sperm from reaching the ovum. It is a shallow, dome-shaped cup made of flexible rubber or silicone that is inserted into the vagina prior to intercourse. When positioned correctly, it covers the cervix, thus preventing sperm from entering the uterus and fertilizing an egg.

This function differentiates the diaphragm from other options listed. For instance, it does not stimulate ovum production, which is a process primarily regulated by hormones in the body. Additionally, the diaphragm is not responsible for regulating menstrual cycles; that is a function more closely associated with hormonal birth control methods. Finally, while its presence may contribute to a sense of bodily awareness during intercourse, its primary purpose is not to increase sexual pleasure but to provide a physical barrier to prevent pregnancy.