Definition
Definition
Hemophilia is a group of bleeding disorders. It is caused by low amounts of specific clotting factors. These factors help to stop bleeding.
The most common types of hemophilia are:
Hemophilia A (classic hemophilia)—accounts for 80% of all hemophilia (1 in 5,000 males), caused by too little factor VIII
Hemophilia B (Christmas disease)—occurs in 1 in 20,000 males, caused by too little factor IX