title: Serum HPL in normal and high risk pregnancy by haemagglutination inhibition test.
mesh_terms: D005260:Female; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D010928:Placental Lactogen / Q000097:blood*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000097:blood*
chemical_list: D010928:Placental Lactogen