The diaphragm is a dome-shaped rubber cap with a flexible rim which fits inside the vagina, covering the cervix (entrance to the uterus).

Does It Work?

The diaphragm is effective between 85% and 94% depending on how correctly it is used every time a couple have sex.

How Does It Work?

The diaphragm acts as a barrier between the sperm, the fertile mucous in the cervix and the egg produced by the ovary.

Advantages:

The diaphragm

• Does not interfere with a woman's menstrual cycle
• Is used only when needed
• May lower the chance of getting some sexually transmitted infections which live around the cervix such as gonorrhoea and chlamydia
• Can be used during a woman's period to "hold back" the flow of blood but should be changed every four hours.

Disadvantages:

• Some women have an allergy to rubber and spermicide which means using a diaphragm is unwise
• If the diaphragm is the incorrect size there can be some discomfort
• The failure rate is up to 15% therefore pregnancy can occur
• Diaphragm users record a slightly higher rate of urinary tract infections.

Fitting a Diaphragm

When you visit your doctor or Family Planning Nurse Practitioner you will be fitted for a diaphragm as well as shown how to use it correctly.

A week later you will return to the clinic to have the device checked to determine whether you are fitting it correctly. It is recommended that you use another form of contraception during this "practice" period.

A Refit Is Necessary When

• Prior to getting a new diaphragm
• After a weight gain or loss of 5 kgs or more
• After a full term pregnancy
• If the diaphragm feels uncomfortable or slips during intercourse.

Page maintained by:FPV Webmaster
Last updated:25/10/2005
© Family Planning Victoria