title: Think ectopic pregnancy.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D000292:Pelvic Inflammatory Disease / Q000175:diagnosis; D010808:Physical Examination; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000175:diagnosis* / Q000601:surgery; D014463:Ultrasonography