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.
Mitral Valve Disease (MVD) is the most common form of heart disease in dogs. It generally occurs in small to medium size dogs rather than big dogs, and some breeds are more susceptible than others. These breeds include: Cavalier King Charles Spaniel, Poodle, Schnauzer, Chihuahua, Fox Terrier and Boston Terrier.VD is a disease that affects the surface of the heart valves. Other names you may hear used to describe MVD are endocardiosis or Valvular Insufficiency. The valves are normally smooth and form a perfect seal when closed. MVD causes the edges to become thickened, lumpy and distorted.