The most common form, hemophilia A, is observed in 80 percent of hemophiliacs and is caused by a lack of factor VIII, and in the second most common, hemophilia B, factor IX is missing. Hemophilia is classified as either mild, moderate or severe, depending on the amount of clotting factor a person has in his body. Severe hemophilia is suprisingly the most common form. A person with severe hemophilia has less than 1% of the normal amount of

Currently, most people with severe forms of hemophilia use a prophylactic treatment in which they infuse, the needed factor proteins into their bloodstream through a vein or through a closed tube leading into a vein. This treatment is called "factor replacement therapy".

A person with mild hemophilia may only have problems with bleeding when he has surgery, severe dental work, or a major injury. A person with moderate hemophilia will have those problems plus bleeding problems with more minor injuries such as a hard bump to the elbow. Lastly, a person with severe hemophilia can have what are called spontaneous bleeds. Which is bleeding that starts inside the body for no known reason. The following diagram illustrates the levels of clotting factor found in normal people, as well as people with mild to moderate to severe hemophilia.

Some topics in this essay:
Introduction Hemophilia, Disorder People, severe hemophilia, clotting factor, mother chromosome, amount clotting factor, mild moderate severe, carried mother chromosome, person severe hemophilia, factor carried mother, mild moderate, moderate severe, amount clotting, hemophilia gene, common form, person hemophilia, diagram illustrates,