The present invention relates to bispecific antibodies that can bind to
coagulation factor IX (FIX) and / or its activated form
factor IXa (FIXa) and
factor X (FX) and / or its activated form factor Xa (FXa) and promote the activation of FX by FIXa, as well as methods and compositions for treating subjects suffering from
coagulopathy such as hemophilia A with or without inhibitors.