Haemophilia is an inherited bleeding disorder where the body lacks critical clotting factors to form blood clots.

The body has proteins called clotting factors which are involved in normal blood clot formation. When there is a deficiency of the clotting factors caused by abnormalities in the genes which are responsible for their production, this results in haemophilia.  Deficiencies in clotting factor 8 results in haemophilia A and deficiencies in factor 9 results in haemophilia B.