During a well woman exam, we generally focus on the Pap smear, mammogram and bone density – the screenings we do depend on the age of the woman. Women should start getting a regular mammogram between the ages of 40 and 55, unless there is a family history of breast cancer. A Pap smear should be started whenever you become sexually active. A Pap smear is usually done annually – the frequency can vary with the number of number of sexual partners you have.