A diaphragm is placed in your vagina like a tampon so that it covers the cervix entrance to the uterus and tucks in behind the pubic bone to stop sperm from entering. It's held in position by the pelvic muscles. There is only one type of diaphragm available in Australia. It is a single size diaphragm, called Caya, which is designed to fit most women.
The diaphragm is a dome-shaped rubber cup with a flexible rim. It is used to help prevent pregnancy. Before you have sex, you put contraceptive cream or jelly into the diaphragm and then put the diaphragm into your vagina. The contraceptive cream or jelly contains a chemical that kills sperm spermicide.
The diaphragm is a round silicone cup that holds spermicidal jelly or cream against the cervix. Although it may prevent some sperm from entering the cervix, it does not and cannot fit snugly enough to protect against pregnancy by itself. Therefore, spermicide is essential for the diaphragm to work.
The diaphragm and cervical cap are silicone cups that are used with a special gel or cream called spermicide a substance that kills sperm. The diaphragm or cervical cap is inserted into the vagina and over the cervix to keep sperm from entering the uterus, meeting with and fertilizing an egg. The diaphragm and cervical cap come in different types and sizes. You should be fitted by a trained healthcare provider who will ensure that you can insert the device properly.