How effective are the diaphragm and cervical cap?
The effectiveness depends to a large extent on proper fitting and committed use. The contraceptive action results solely from the mechanical covering of the cervix. In the acid milieu of the vagina sperm only remain capable of fertilizing for about 6 to 8 hours. The diaphragm and cervical cap must be left in place during this time. Both methods have a moderately high failure rate. The effectiveness of both methods is increased by additional use of a spermicide. The spermicidal cream or jelly is placed in the bowl of the diaphragm or cap. It is important to remember that the spermicidal action takes a few minutes to develop and only lasts a limited length of time. If you have repeated or prolonged sexual intercourse you must place more spermicide in the vagina after a while. Be careful not to dislodge the cap or diaphragm in the process. The diaphragm and cap must be left in place for at least 6 to 8 hours after intercourse. You should not bathe during this time either. The diaphragm mu
