What is it?

A diaphragm is barrier method of birth control that is to be used when you anticipate (expect) that you will be having sex.  The diaphragm is a thin latex cup that fits over the cervix.

How does it work?

The woman must insert the diaphragm high into the vagina and cover the opening to the cervix.  The diaphragm can now act as a barrier, preventing sperm from getting through the cervix and into the uterus (where pregnancy occurs).  During intercourse, the vagina moves, and may cause the diaphragm to move, so it is important to use spermicide along with the diaphragm for added protection against pregnancy.

Remember, diaphragms protect against pregnancy but they DO NOT protect you from Sexually Transmitted Infections (STIs).

How effective is it?

With the addition of spermicide, the diaphragm is 82% effective in preventing pregnancy

Possible Side Effects

• Allergy to latex or to the chemical in spermicide (nonoxynol-9)
• The diaphragm may increase the risk of developing (getting) a yeast infection
• Toxic shock syndrome may develop if the diaphragm is left in for too long (greater than 24 hours)

The diaphragm is a good choice for you, IF:

• You prefer a non-hormonal type of birth control

The diaphragm is not for you, IF:

• You are uncomfortable with insertion and removal of the device
• You have a history of toxic shock syndrome

Important points

• Wash your hands before you touch and insert the diaphragm

• Apply a spermicide before inserting the diaphragm. Reapply the spermicide for each act of intercourse (sex) without taking the diaphragm out.
• The diaphragm should not be removed sooner than 8 hours after having sex and should not stay in for longer than 24 hours.
• Always use water-based lubricants or moisturizers.  Oil-based products break down the diaphragm.

• Wash your diaphragm with a mild soap after use.  Dry it before storing away from heat and light.

• Always carry your diaphragm and spermicide with you. A diaphragm is good for up to 2 years.
• To determine the correct diaphragm size/type, your doctor will perform an internal medical exam.  If you do not have a family doctor, one can be provided for you at the Health Unit.

For additional information on the diaphragm or other questions related to sexual health contact the Windsor Essex County Health Unit at (519) 258-2146 ext 1200 or 1201

The Society of Obstetricians and Gynaecologists of Canada. (2000). Sex Sense:

Canadian Contraceptive Guide. Ottawa, ON.

The Society of Obstetricians and Gynaecologists of Canada. (2000). Choosing a

contraceptive that’s right for you…. Ottawa, ON.

Limburg, J. Middlesex-London Health Unit. (1998) Birth Control Options. London, ON.

May 1, 2007

Sexual Health/Old Website Files/Fact Sheets/Birth Control Methods