Both the cervical cap and the diaphragm are rubber cups that fit inside the vagina and block the entrance to the cervix. They are barrier methods that block the sperm from swimming into the female's reproductive system, reaching the egg and starting a pregnancy.

diaphragm

cervical cap

Both come in different sizes since women's bodies are different sizes. A health care provider will determine which size would work for you during an exam. The diaphragm is used with spermicide so the spermicidal chemicals kill sperm that slip around the edge of the diaphragm. The cervical cap provides a tighter barrier around the cervix as it creates a suction seal onto the cervix.

The diaphragm must be inserted into the vagina before intercourse and left in place for six to eight hours after intercourse. The cervical cap can stay in for up to 48 hours before it is removed. Both methods of birth control offer NO protection against sexually transmitted diseases, so a condom must also be used during intercourse.

Both methods are about 80 to 85 percent effective at preventing pregnancy with typical use. If used perfectly, they prevent pregnancy about 94 percent of the time.

Sometimes, females become allergic to the spermicides. Other times, they get irritations just from having the cap or diaphragm inside them or experience pressure against their bladder. The other downside is that in certain sexual positions, the diaphragm and cervical cap can slip out of position, which increases the chance of getting pregnant.

The diaphragm is a good choice for women who can always plan when they will have sex so they can have the diaphragm and spermicide with them, feel comfortable putting the diaphragm inside their vagina, and who can't or don't want to use hormonal contraception.

To get either, you need to be fitted by a doctor or other healthcare provider. You also need a prescription. Cost varies depending on where it is fitted and purchased.

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