The diaphragm is a dome-shaped cup that fits over the opening to
the cervix and prevents pregnancy. For effective birth control,
your diaphragm (see pictures below) has to fit well. Your doctor
will measure your vagina to find the correct size and fit for
you. Your doctor or a nurse will teach you how to put the
diaphragm in and take it out. You also should read the
directions from the company that made your diaphragm To be sure
that you know how to use your diaphragm, you will need to
practice putting it in and taking it out while you are in your
doctor's office. Your doctor will check to see that the
diaphragm fits right. To lower your risk of getting pregnant,
you must use your diaphragm correctly and use it every time you
have sex. You must also use the diaphragm with spermicide (a gel
or cream that kills sperm trying to enter the cervix) in order
to prevent pregnancy. You can put the diaphragm in your vagina
up to 1 hour before you have sex. Once in place, the diaphragm
provides protection for 6 hours. G