Rainbow Pediatrics Knowledgebase
  • Knowledgebase: Questions about Sex, Puberty, and Periods

    Questions about Sex, Puberty, and Periods, for adolescents and their parents.


    6. What about the diaphragm? - Top

    Both the diaphragm and cervical cap are barrier methods of contraception. They work by physically blocking the sperm from entering the cervical opening. Both are made of rubber: the diaphragm is in the shape of a shallow cup, and the cap is more like a thimble. When a diaphragm or cervical cap is fitted correctly and used properly, the success rate is high. Both of these methods are used with spermicidal jelly or cream, creating a double form of contraception: physical and chemical.

    You can insert a diaphragm before intercourse. It needs to be left in for at least six hours after intercourse. If you have intercourse a second time, add more cream or jelly without removing the diaphragm by using the applicator. The size of the diaphragm you use depends on the shape and contour of your vagina and the muscle strength of the surrounding vaginal walls. A health care provider will do an examination and fit you for the proper size. The provider will also teach you how to insert and remove the diaphragm. It's a good idea to practice taking it in and out a few times before you leave the office.

    A cervical cap is smaller than a diaphragm. It's not absolutely necessary to use a spermicidal cream or jelly with a cap, but it's certainly recommended. The cap is designed to provide an almost airtight seal around the cervical opening. An advantage of the cervical cap is that it can be put in on a Friday night and left in for the weekend. The cervical cap is also fitted by a health care provider; however, it only comes in limited sizes which do not fit all women.

    - Updated: March 10, 2001

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