Diaphragm birth control is a small, reusable tool made of either rubber or silicone. It is shaped like a cup or dome with flexible rims that cover the cervix to prevent the sperm from invading the uterus during sexual intercourse.
A prescription from a health care provider is needed in order to use a diaphragm. Additionally, they will provide you with the correct size for the traditional ones. However, there is currently a new version called the Caya diaphragm that comes in one size.
The diaphragm birth control is placed deep inside the vagina, where the rim fits tightly behind the pubic bone. For effectivity in preventing pregnancy, it should be used with spermicide.