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This includes Factor I, Factor II, Factor V, Factor VII, Factor X, Factor XI, Factor, XII, and Factor XIII.

There are ten clotting factors that are necessary in forming a blood clot. Deficiencies in Factors VIII and IX are well known to most people, but what of the other factor deficiencies? Not everyone is as familiar with these conditions because they are diagnosed so rarely. To date, deficiencies in eight of the lesser known coagulation factors have been documented in the medical literature. Many of these disorders were only discovered or described within the last 40 years.

This was sourced from the National Hemophilia Foundation website (


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