title: Human placental lactogen and twin pregnancy.
mesh_terms: D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D010928:Placental Lactogen / Q000097:blood*; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D011272:Pregnancy, Multiple; D011863:Radioimmunoassay; D014427:Twins
chemical_list: D010928:Placental Lactogen