To use a diaphragm correctly, follow the directions enclosed with the brand and style prescribed. In general, a teaspoonful of spermicide is placed into the cup. The rim is squeezed together by pressing the rim firmly between the thumb and the third finger. With your fingers, spread the inner labia and slide the diaphragm into the vagina with the rim facing upward. Then use a forefinger to push the lower rim back and up above the pubic bone. Reach into the vagina with a finger to check for accurate placement. The cervix can be felt through the soft cup (feels like the end of ones