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.
The most common hereditary disorder of hemostasis is von Willebrand disease (see Von Willebrand Disease) The most common hereditary coagulation disorders are the hemophilias. NOTE: This is the Professional Version. NOTE: This is the Professional Version. Abnormal bleeding can result from disorders of the coagulation system (see Overview of Hemostasis), of platelets, or of blood vessels. Disorders of coagulation can be acquired or hereditary.