Hemophilia is a type of bleeding disorders that impair the body’s ability to form blood clots. The disease occurs when there is no or insufficient clotting factors. There are different subtypes of hemophilia. Each of these subtypes is caused by different clotting factors.
The most common subtypes are hemophilia A and hemophilia B. The former one is caused by the missing or insufficient factor VIII, while the later one is the result of factor IX deficiency. Other rare factor deficiencies include factor I, II, V, VII, X, XI, XII and XIII.
Keywords: factor hemophilia; factor ix hemophilia