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.
Heart disease is common in dogs. Valvular heart disease is the most common cause of heart disease and is especially common in small breed dogs. The mitral valve is the valve of the heart that is most often affected.eart disease in dogs is a common diagnosis. In large breed dogs, dilated cardiomyopathy is the most common cause of heart disease. Learn more about canine dilated cardiomyopathy and what causes this heart disease in dogs.