To be effective, diaphragms and caps need to be used in combination with spermicide - a chemical that kills sperm.
If used correctly, and in combination with spermicide, diaphragms and caps are estimated to be 92-96% effective in preventing pregnancy.
There are other, more effective, contraceptives available, such as the oral contraceptive pill. However, some women prefer to use diaphragms or caps because they don't like taking the pill. Others cannot take the pill for health reasons.
Diaphragms and caps only provide limited protection against sexually transmitted infections (STIs) such as HIV. |