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 inherited bleeding disorder in humans and dogs is vWD. Type 1 is the most common form of vWD and is characterized by a low concentration but normal function of all multimers. Most animals with type 1 vWD have mild clinical signs that occur most commonly with trauma, hematuria, or deciduous tooth loss.