Most women should be screened for cervical cancer no more often than once every three to five years, according to new guidelines issued today by The American College of Obstetricians and Gynecologists (The College). In addition to extending the interval between Pap tests, co-testing with the Pap test and the human papillomavirus (HPV) test is preferred to the Pap test alone but should be limited to women age 30 and older and used only once every five years.