How effective is a diaphragm?
The diaphragm has a failure rate of approximately 5% for correct and consistent use. Typical use, which is the average way diaphragms are used, has a failure rate of approximately 18 – 20%. This means that 18 to 20 people out of every 100 will become pregnant during the first year of use. You should take a pregnancy test if you are experiencing any pregnancy symptoms.
