Diaphragms and caps

What is it?

A diaphragm is inserted into the vagina before sex, and is used to prevent sperm from travelling to the womb. It is made of rubber or silicone, with the cap being of similar type but smaller.

How does it work?

The diaphragm or cap is placed into the vagina before sexual intercourse, and is used along with spermicide, which kills sperm. You will need to see a GP or professional to ensure you get a diaphragm or cap that fits correctly. They are reusable, but must be cleaned after each use.

How dependable is it?

As long as they are used with spermicide, then diaphragms and caps are around 92-96% effective. They are best used alongside another form of contraception, and it will not protect against STIs.

Other important information

You are best seeing a demonstration from a GP on how to properly attach the diaphragm or cap. A change in weight, or other extraneous variables, may result in you needing a different shaped diaphragm or cap. Spermicide must be used in conjunction with this form of contraception.


This is a unique website which will require a more modern browser to work!

Please upgrade today!