A 40 year old G2P2 woman presents for her first health maintenance examination. She denies any new complaints or symptoms. She has no history of any gynecologic problems. Family history is significant for a father with hypertension and a mother, deceased, with breast cancer diagnosed at age 56. A paternal aunt has ovarian cancer, which was diagnosed at age 83. A physical exam is unremarkable. What screening test should be offered to this patient next