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 PVDs include otitis media/interna, idiopathic vestibular syndrome, ototoxic drugs, and hypothyroidism. Oropharyngeal polyps in cats can also cause peripheral vestibular disease.Otitis media/interna is the most common cause of PVD in both dogs and cats.hat are the most common signs of vestibular disease? Vestibular diseases are common in dogs and cats and may result in any combination of the following clinical signs: head tilt, falling, leaning, rolling, circling, nystagmus, strabismus, and ataxia.