title: Imaging techniques in obstetrics.
mesh_terms: D000016:Abnormalities, Radiation-Induced / Q000517:prevention & control; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D011859:Radiography / Q000009:adverse effects; D014463:Ultrasonography