A reusable silicone dome-shaped cup that covers the cervix to keep sperm out. A provider does the initial fitting and gives a prescription for the right size. You put it in yourself at home each time you have sex. It's best to always use spermicide with a diaphragm. Read more.

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The diaphragm does not protect against HIV or STIs. Always use a condom.

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Effectiveness based upon typical use.​