Haemophilia is a genetic disorder. Usually males are the victims
and females are carriers of this disease.
There is no prominent cause of this disease but now-a-days it is
seen that the families which do not have any history of haemophilia
may also have a haemophiliac child. The reason for this is that
sometimes there is mutation at genetic level which may lead to
deficiency of clotting factor(VIII OR IX) in the blood of the child
resulting in haemophilia.
One may also suffer from haemophilia at a very later stage of
his life but that is very rare. This is the case of Acquired
Haemophilia.