Living with Factor V Leiden Factor V Leiden is the most common hereditary blood coagulation disorder in the United States. It is present in 5% of the American population.
University of Illinois Patient Resources Description of factor V Leiden, its risks and treatment options. Also discusses the impact of other conditions on this disease.
Factor Five Leiden Support Support for sufferers of the Factor Five Leiden blood clotting disorder, an inherited blood condition discovered in 1995. History, glossary, and meeting information (Oregon).