The Guidelines
Women should begin getting a Pap test without HPV test every two years from ages 21-30
A Pap test with HPV test every three years from ages 31-65

The Reasons
Cervical cancer is curable more than 90 percent of the time when caught early. In addition, sexually active women age 24 or younger should include chlamydia screening during their pelvic exams. These young women are most at risk for the infection. But about 75 percent of women with chlamydia have no noticeable symptoms. About 40 percent of untreated cases lead to pelvic inflammatory disease, which can damage the ovaries and uterus, making it impossible to have children.
Source: The Chronicle-Telegram 10-14-2012 Elyria, Ohio