title: Comparison of amniotic-fluid and maternal serum alpha-fetoprotein levels in the early antenatal diagnosis of spina bifida and anencephaly.
mesh_terms: D000032:Abortion, Therapeutic; D000510:Alpha-Globulins / Q000032:analysis* / Q000378:metabolism; D000653:Amniotic Fluid / Q000032:analysis*; D000757:Anencephaly / Q000097:blood / Q000175:diagnosis*; D001800:Blood Specimen Collection; D005260:Female; D005326:Fetal Proteins / Q000032:analysis* / Q000378:metabolism; D005333:Fetus / Q000378:metabolism; D005865:Gestational Age; D006801:Humans; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D011272:Pregnancy, Multiple; D011296:Prenatal Diagnosis; D011863:Radioimmunoassay; D014427:Twins
chemical_list: D000510:Alpha-Globulins; D005326:Fetal Proteins