A small birth-control device made of silicone that sits on the cervix to discourage male ejaculate from entering. It is smaller than a diaphragm and is shaped like a sailor’s hat. It is needs to be filled with birth control jelly. It can be inserted a few hours before intercourse, and must not be removed for at least six hours after the male ejaculates. Can be left in place for up to two days. Cervical caps have a high failure rate of 29% during typical use. AKA a FemCap or Lea’s Shield. While it is not as effective as a diaphragm, it can be left in for up to two days. There are more effective methods of birth control, especially for women who have had a prior pregnancy.