diaphragm

contraceptive

Also known as: Dutch cap

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Last updated

June 25, 2026

Quick Summary

A diaphragm is a barrier method of contraception used to prevent pregnancy. It is a molded cap, typically made of thin rubber, that is fitted over the uterine cervix. When used with a spermicide, it acts as a mechanical barrier, preventing sperm from entering the uterus. Historically, diaphragms, also known as pessaries, were among the birth control devices sold in the late 19th and early 20th centuries. While effective when used correctly, their typical failure rate is about 13 percent.1234

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contraception
Barrier devices
…the uterine cervix with a diaphragm or cervical cap (used with a spermicidal cream or jelly), or by inserting a female condom (vaginal pouch) or a vaginal sponge permeated with a spermicide. The vaginal sponge is less effective than other devices but can be used for 24 hours. Spermicides, which—as…
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…the uterine cervix with a diaphragm or cervical cap (used with a spermicidal cream or jelly), or by inserting a female condom (vaginal pouch) or a vaginal sponge permeated with a spermicide. The vaginal sponge is less effective than other devices but can be used for 24 hours. Spermicides, which—as…
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birth control
Barrier methods
…barrier method such as a diaphragm or a disposable sponge.
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…barrier method such as a diaphragm or a disposable sponge.
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