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.
Pemphigus foliaceus (PF) is the most common autoimmune disease in dogs. It is characterized by pustules, ulcers and crusts (scabs) developing on the canineâs skin surface. Pemphigus foliaceus is an autoimmune skin disease that typically begins in middle age dogs. Pemphigus foliaceus usually starts off as small, red patches, which quickly become pustules (pus filled blisters) and burst open. Thick crusts (scabs) form after the pustules bursts.