title: Immunologically undetectable human placental lactogen in a normal pregnancy. Case report.
mesh_terms: D000328:Adult; D004591:Electrophoresis, Polyacrylamide Gel; D005260:Female; D006801:Humans; D010920:Placenta / Q000032:analysis; D010928:Placental Lactogen / Q000032:analysis*; D011247:Pregnancy; D011863:Radioimmunoassay
chemical_list: D010928:Placental Lactogen