Risks

The diaphragm doesn't offer reliable protection from sexually transmitted infections (STIs).

When using a traditional diaphragm, an estimated 12 out of 100 women will get pregnant in the first year of typical use of the diaphragm. And an estimated six out of 100 women will get pregnant during the first year of use when following usage instructions exactly.

For a newer type of diaphragm — the Caya diaphragm — pregnancy rates are slightly higher, with an estimate that around 17 out of 100 women will get pregnant after one year of typical use.

Consistent and correct use is essential to the effectiveness of either type of diaphragm. For example, you may get pregnant when using a diaphragm if:

• You don't use the diaphragm every time you have sex
• The diaphragm becomes dislodged from the cervix during sex
• You don't use spermicide
• You remove the diaphragm within six hours after having sex

Spermicide applied to the diaphragm may damage the cells lining the vagina, causing:

• Increased risk of contracting STIs
• Vaginal irritation
• Urinary tract or vaginal infection

Contact your health care provider if:

• The diaphragm slips out of place when you walk, sneeze, cough or strain
• You notice blood on the diaphragm after you remove it that isn't related to your period
• You or your partner experiences pain during or following use of the diaphragm
• You have signs or symptoms of toxic shock syndrome, such as a sudden high fever, diarrhea, dizziness, vomiting, fainting or a rash that looks like sunburn
• You're unable to remove the diaphragm