How Effective Is The Diaphragm For Pregnancy Prevention?
With absolute perfect use the Diaphragm is about 91% effective, meaning that about 9 out of 100 women using the Diaphragm may become pregnant. But many women do not use the device 100% correctly, 100% of the time. So with “typical” use of the Diaphragm, it is about 80% effective, meaning that 20 out of 100 women using the Diaphragm will become pregnant. It is important that the Diaphragm fits right and is used correctly or it decreases in effectiveness.
