WFH NETWORK

Definitions and terminology

There are three levels of severity of hemophilia: mild, moderate, and severe. The severity of hemophilia depends on the amount of clotting factor in the person’s blood.

Any person (male or female) with 5-40 per cent of the normal amount of clotting factor has mild hemophilia.

A person with between 1-5 per cent of the normal amount of clotting factor has moderate hemophilia.

A person with less than 1 per cent of the normal amount of clotting factor has severe hemophilia.

A woman who has less than 40 per cent of the normal level of clotting factor is no different from a man with the same factor levels—she has hemophilia.

Some carriers have symptoms of hemophilia even though their clotting factor levels are above 40 per cent. A woman with levels of 40-60 per cent of the normal amount of clotting factor who experiences abnormal bleeding is called a symptomatic carrier.


Updated November 2012

 

Find a treatment centre

 

Search the Publications Library

 

Read Hemophilia World

 

Access Haemophilia Journal