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Hemophilia A, B & C

It’s important to know which type of hemophilia your loved one has, so that you know which clotting factor they are lacking, or have too little of. This can affect both their symptoms and treatment.

Our bodies have different clotting factors that are needed to stop bleeding after an injury. People with hemophilia A are missing or have too little of a clotting factor called Factor VIII. This is the most common form. Hemophilia A has two other names:

  • Classic hemophilia, because it is the most common of the factor deficiencies.
  • Factor VIII deficiency hemophilia, because Factor VIII is the clotting factor that is lacking.

People with hemophilia B are missing, or have too little, of a clotting factor called Factor IX. This bleeding disorder has similar symptoms to hemophilia A, but is much less common.

People with hemophilia C lack the Factor XI clotting protein. It is very rare, and even researchers don’t know a lot about it. Unlike hemophilia A and B which affect mainly boys, hemophilia C affects both girls and boys equally because it is inherited in a different way.

XMYTH: Hemophilia only affects males.

checkmarkFACT: While hemophilia mostly affects males, many women who are carriers of hemophilia can have symptoms of a bleeding disorder.
Learn more

Information Booklet on Mild Hemophilia

A booklet for people living with milder forms of hemophilia, developed by the Atlantic Hemophilia Nurses Group of the Canadian Association of Nurses in Hemophilia Care (CANHC).

Download Booklet on Mild Hemophilia

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