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Pap Test

A Pap test is done to look for changes in the cells of the cervix. During a Pap test, a small sample of cells from the surface of the cervix is collected by your health professional. The sample is then spread on a slide (Pap smear) or mixed in a liquid fixative (liquid-based cytology) and sent to a lab for examination under a microscope. The cells are examined for abnormalities that may indicate abnormal cell changes, such as dysplasia or cervical cancer.

It is important to have your first Pap test within 3 years of having sex for the first time or by age 21. You may be able to stop having regular Pap tests after you are 65 to 70 years of age, if you have had 3 normal Pap tests in a row, you do not have a high risk of cervical cancer, and you have not had any new sex partners over the last 3 years. If you do not have a uterus, you don’t need a Pap test as long as cervical dysplasia or cervical cancer was not the reason your uterus was removed. You may need more frequent Pap tests if you have had an abnormal Pap test in the past. Talk with your health professional about how often you should have Pap tests.

A high-risk type of the human papillomavirus (HPV) is the cause of most cases of cervical cancer. In women older than 30, an HPV test may be done at the same time as a Pap test. A vaccine ( Gardasil) is available to prevent infection with the types of HPV that are most likely to cause cervical cancer.

If your Pap test shows an abnormal result, see the topic Abnormal Pap Test.

Why It Is Done

A Pap test is done to look for changes in the cells of the cervix. Finding these changes and treating them when needed will greatly lower your chance of getting cervical cancer.

A Pap test is usually done as part of a woman's regular pelvic exam. For more information, see the medical test Pelvic Examination.

How To Prepare

Before a Pap test:

  • Try to schedule the test when you are not having your period, since blood can interfere with the results of the test. If your bleeding is light, you may still be able to have a Pap test.
  • Do not use douches, tampons, vaginal medicines, sprays, or powders for at least 24 hours before having a Pap test.

At the beginning of your visit, tell your health professional:

  • If you are or might be pregnant.
  • If you have any reproductive or urinary tract symptoms such as itching, redness, sores, swelling, or an unusual odor or increased vaginal discharge. If you have been performing regular vaginal self-exams, discuss any changes you have noticed with your health professional. For more information, see the medical test Vaginal Self-Examination (VSE).
  • If you are using birth control.
  • If this is your first Pap test.
  • The first day of your last menstrual period and how long your period lasted.
  • If you have had surgery or other procedures such as radiation therapy to the vagina, cervix, vulva, or uterus.
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WebMD Medical Reference from Healthwise

Last Updated: August 07, 2009
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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