Cap or diaphragm
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A contraceptive diaphragm or cap is a barrier method of contraception. It is usually a circular dome made of plastic although they come in different shapes, sizes and materials. It is inserted into the vagina before sex and you need to use it with a gel that kills sperm called spermicide. It's a bit tricky to get the hang of, but some women love it.
What is in the Cap or diaphragm?
A contraceptive diaphragm or cap is a circular dome made of thin,
soft silicone,
although they come in different shapes,
sizes and materials. You need to use it with a gel that kills sperm called spermicide. The most common active ingredient of spermicides is nonoxynol-9.
Frequency
During or before sex
Effectiveness
83% - 84%
Blood clot risk
None
Effect on fertility
None