Haemophilia is a bleeding disorder in which the blood doesn’t clot normally because of the absence of some vital clotting factors. It is an X-linked congenital bleeding disorder.

Following are the two common types of Haemophilia:
1. Haemophilia A (Classic Haemophilia): Haemophilia A is caused by a lack or decrease in the levels of clotting factor VIII.
2. Haemophilia B (Christmas Disease): Haemophilia B is caused by a lack or decrease in the levels of clotting factor IX