The Pap test is a very simple and important test. The doctor uses the Pap test to see if there are any changes in the cervix. The best time for a woman to have a Pap test is 10 to 20 days after her period. A Pap test can be done in a doctor's office or a health clinic. The doctor or nurse practitioner uses a tool called a speculum to hold the vagina open to see the upper part of the vagina and the cervix. Then the doctor uses a wooden scraper or a small brush to get some cells from the cervix and vagina. He or she puts these cells on a glass slide or in a solution and sends it to a laboratory to be looked at under a microscope to check for abnormal cells.