abnormal circulating factor VIII level decreased circulating factor VIII level MP:0012328 csmith reduced anti-hemophilic factor level MPheno.ontology decreased Coagulation Factor VIII level decreased anti-hemophilic factor level 2013-11-22T15:42:02Z reduced Coagulation Factor VIII level reduced circulating factor VIII level reduced AHF level decreased AHF level reduced levels of the antihemophilic factor that is part of the factor VIII/von Willebrand factor complex; it is produced in the liver and acts in the intrinsic pathway of blood coagulation; it serves as a cofactor in factor X activation and this action is markedly enhanced by small amounts of thrombin decreased circulating protein level