how femcap works
The cervical cap is a small, bowl-shaped device that fits snugly over the cervix and has a strap for easy removal. The FemCapÂ® silicone cervical cap is the only cervical cap that is currently available in the United States. Like the diaphragm, the cervical cap is designed for use with spermicide. It works by creating both a physical and a spermicidal barrier at the opening of the cervix. The FemCap is available in three sizes (22, 26, and 30 mm as measured by the inner diameter of the rim).