title: Elevated maternal serum alpha-fetoprotein with normal ultrasound: is amniocentesis always appropriate?
authors: D W
authors: DW
authors: Hershey
mesh_terms: D000649:Amniocentesis / Q000009:adverse effects; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D012307:Risk Factors; D016136:Spina Bifida Occulta / Q000175:diagnosis; D014463:Ultrasonography; D000509:alpha-Fetoproteins / Q000097:blood*
chemical_list: D000509:alpha-Fetoproteins