title: Variability of naturally occurring antihuman placental lactogen dependent upon preparations tested.
mesh_terms: D000818:Animals; D000941:Antigens; D002850:Chromatography, Gel; D005260:Female; D005333:Fetus / Q000276:immunology; D006041:Goats; D006801:Humans; D005779:Immunodiffusion; D007075:Immunoglobulin M; D010926:Placental Hormones; D010928:Placental Lactogen; D011247:Pregnancy; D011817:Rabbits
chemical_list: D000941:Antigens; D007075:Immunoglobulin M; D010926:Placental Hormones; D010928:Placental Lactogen