title: Letter: Maternal serum alpha-fetoprotein and prospective screening.
mesh_terms: D000328:Adult; D005189:False Positive Reactions; D005260:Female; D005326:Fetal Proteins / Q000032:analysis*; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D011446:Prospective Studies; D016135:Spinal Dysraphism / Q000097:blood / Q000175:diagnosis*; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D005326:Fetal Proteins; D000509:alpha-Fetoproteins