What is hemophilia b?

If your child has hemophilia, his blood doesn't clot like it should. If he has a cut, scrape, or other injury, he will bleed longer than other people do. The bleeding can happen both on the surface or inside his body. It can be serious. read more

Hemophilia A and B are inherited in an X-linked recessive genetic pattern, so males are commonly affected while females are usually carriers of the disease. Hemophilia A is caused by a deficiency of clotting Factor VIII, while hemophilia B (also called Christmas disease) results from a deficiency of Factor IX. read more

Hemophilia B is the result of the body not making enough factor IX. Hemophilia B is caused by an inherited X-linked recessive trait, with the defective gene located on the X chromosome. Females have 2 copies of the X chromosome. read more

Hemophilia B, also called factor IX (FIX) deficiency or Christmas disease, is a genetic disorder caused by missing or defective factor IX, a clotting protein. Although it is passed down from parents to children, about 1/3 of cases are caused by a spontaneous mutation, a change in a gene. read more