A cervical cap is a method of birth control that you insert into your vagina to cover your cervix. You also need to line the cap with spermicide to kill any sperm that make it past the barrier.

It keeps out sperm. Your doctor will need to fit your cap. You’ll also use it with spermicide. How well does it work? About 22 out of every 100 people using the cervical cap get pregnant in a year.

Intrauterine devices are contraindicated in women with abnormal uterine shape. Cervical caps may be difficult to get an adequate seal because of altered cervical shape. Preconception Care for ...

A popular Roman writer advocated abstinence. "Womb veils," a 19th-century phrase for diaphragms cervical caps, and condoms, often made from linen or fish intestines, have been in use for centuries.