title: Fetal physiology and behaviour: changing direction 1954-1983.
mesh_terms: D000818:Animals; D001519:Behavior; D002302:Cardiac Output; D005333:Fetus / Q000502:physiology*; D006128:Growth; D006801:Humans; D010500:Perinatology; D010827:Physiology / Q000295:instrumentation / Q000379:methods / Q000639:trends*; D010920:Placenta / Q000276:immunology; D012119:Respiration; D012756:Sheep / Q000196:embryology; D012894:Sleep Stages