Hemophilia is a rare disorder in which your blood doesn't clot normally because it lacks sufficient blood-clotting proteins. Hemophilia affects mostly males

What is Hemophilia?

Hemophilia A and hemophilia B are inherited in an X-linked recessive pattern. The genes associated with these conditions are located on the X chromosome, which is one of the two sex chromosomes. In males, one altered copy of the gene in each cell is sufficient to cause the condition.

Hemophilia affects 1 in 5,000 male births. About 400 babies are born with hemophilia each year. There is less than 200,000 cases of Hemophilia in the United States per year.