title: The efficiency of some placental tests in the course of multiple pregnancies.
mesh_terms: D000469:Alkaline Phosphatase / Q000097:blood; D004967:Estrogens / Q000032:analysis; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis; D005332:Fetoscopy; D006801:Humans; D008991:Monitoring, Physiologic; D010920:Placenta / Q000502:physiology*; D011247:Pregnancy; D011272:Pregnancy, Multiple; D011276:Pregnanediol / Q000652:urine
chemical_list: D004967:Estrogens; D000469:Alkaline Phosphatase; D011276:Pregnanediol