Hemophilia
Hemophilia is a genetic bleeding disorder. People who have hemophilia have a deficiency or an absence of a coagulation protein. ... (Hemophilia 4) People with hemophilia bleed longer, not faster. The severity of hemophilia varies greatly. Hemophilia A and Hemophilia B are the most common genetic bleeding disorders. Hemophilia A is observed in 80 percent of hemophiliacs and is a deficiency or absence of Factor VIII. (Collins 2) It can also be referred to as "classic" hemophilia. In the second most common, hemophilia B, factor IX is missing.