The cervical cap is a silicone or latex cup that fits over the cervix and blocks sperm. Learn how to use it, where to get it, and how effective it is. Cervical Cap - a small cap that is placed over the entrance to the womb by the woman to stop sperm from entering. We explain how to use it and show pros and cons. If you need hormone-free birth control, cervical caps might be for you. Read on learn more about staying safe and protected with cervical caps here! What is a cervical cap? A cervical cap is a small dome-shaped cap that you insert into your vagina before sex to prevent pregnancy. Caps have a wide brim, with a dome or bowl in the center of the cup, and they have a strap across the middle of the dome or bowl, to make them easier to remove.
