How to use diaphragms or caps

Getting a diaphragm or cap fitted

Diaphragms and caps come in different sizes. Caps are smaller than diaphragms.

A doctor or nurse will check the size you need by feeling inside your vagina. You can have a friend, family member or other member of staff in the room with you if you want.

The doctor or nurse will show you how to use the diaphragm or cap, and make an appointment for you to go back in a few weeks to check you're using it correctly.

Using a diaphragm or cap

Follow the instructions that come with the diaphragm or cap, and with the spermicide.

To use a diaphragm or cap correctly:

1. Check the diaphragm or cap for holes before each time you use it.
2. Apply spermicide to the diaphragm or cap, following the instructions a nurse or doctor has given you.
3. Put the diaphragm or cap in your vagina up to 3 hours before sex, making sure it fits over your cervix.
4. Apply spermicide to the diaphragm or cap again every 3 hours until you have sex.
5. After sex, leave the diaphragm or cap in for at least 6 hours.
6. Remove the diaphragm or cap and wash it with soap and water.
7. Dry it carefully and keep it in its container in a cool, dry place.

Do not leave a diaphragm in your vagina for more than 30 hours, or a cap for more than 48 hours.

Do not use a diaphragm or cap during your period, as this may increase the risk of an infection called toxic shock syndrome.

Getting the diaphragm or cap replaced

A diaphragm or cap usually lasts for 1 year before it needs to be replaced.

You may need to get a different size of diaphragm or cap if:

• you lose or gain more than 3kg in weight
• you have a miscarriage or abortion
• you give birth

Contact a sexual health clinic or GP surgery about getting a replacement.

After pregnancy

If you were using a diaphragm or cap as your main method of contraception before giving birth, you will need to wait 6 weeks before you can start using it again.

You should check with a sexual health clinic, doctor, nurse or midwife before using it as you may need a different size.

You should use an alternative method of contraception, such as a condom, during this time.

How well diaphragms and caps work

If used correctly diaphragms and caps are estimated to be between 92 and 96% effective. If not used correctly (for example, forgetting to add spermicide) they are less effective.