title: External quality assessment of serum alpha-fetoprotein assays.
abstract: Adequate control of performance in immunoassays of maternal serum alpha-fetoprotein is an essential part of screening for neural tube defects. Information derived from external quality assessment schemes may be of limited value in monitoring individual laboratory performance and stresses the need for proper internal quality control.
mesh_terms: D005260:Female; D006801:Humans; D011247:Pregnancy; D011786:Quality Control; D011863:Radioimmunoassay / Q000592:standards; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D000509:alpha-Fetoproteins