Definition of primary and secondary amenorrhea. Amenorrhea is the medical term for the absence of menstrual periods, either on a permanent or temporary basis. Amenorrhea can be classified as primary or secondary.
Most inherited bleeding disorders are the result of abnormal platelet function or a deficiency in one or more of the factors involved in the blood clotting system. The most serious and common inherited coagulation disorders in dogs are hemophilia(deficiency of factor VIII or IX) and von Willebrand's disease (lack of von Willebrand factor). Other coagulation disorders are discussed here.
1 It is the most common hereditary coagulation disorder. 2  Hypoprothrombinemia is a congenital deficiency of clotting factors that can lead to hemorrhage. 3  Other coagulation disorders include Factor XI deficiency, also known as hemophilia C, and Factor VII deficiency.