Diaphragms and caps
Diaphragms and caps are circular domes made of thin; soft latex (rubber) or silicone. They are similar to each other although a cap is smaller than a diaphragm.
They come in different sizes. You must be fitted for the correct size by a trained doctor or nurse.
How they are used
A diaphragm or cap is inserted into the vagina before sex; and it covers the cervix so that sperm cannot get into the womb. You need to use spermicide with it (spermicides kill sperm).
It must be left in place for at least six hours after sex. After that time; you take out the cap or diaphragm and wash it with a mild, unperfumed soap and water. They are reuseable.