Summary: by a recent (within 1 year) normal Pap smear and the absence of a visible lesion on the cervix. Vaginal cancer (extremely rare) is ruled out by a normal vaginal exam. Periods at the Wrong Time If a full menstrual flow occurs while the woman is taking her pills, this usually means she has ovulated despite the BCPs.
Image Dimensions: 640 x 427
Image originally found here.