A diaphragm is a barrier method of birth control. A barrier method poses a barrier between the sperm and the egg.
Explanation:
A diaphragm fits over the cervix (entrance of the uterus) and prevents the sperm from finding the egg. As a rule, to increase the success rate of the diaphragm, a spermicide (sperm killing agent), in the form of a gel substance, is applied to the diaphragm before it is inserted into the vagina.
