Exams and Tests

A family history of bleeding disorders aids in diagnosing hemophilia. But certain tests help quantify the disease.

• Pronounced bruising at childbirth or bleeding with circumcision may suggest a case of severe hemophilia.
  
  
• A moderate case of hemophilia may become apparent during the toddler years when falls are common.
  
  
• A mild case may not become evident until adulthood when you need surgery.
  
  
• Blood tests can be performed if you have any reason to suspect hemophilia.
  
  
  • Blood may be checked directly for certain factors.
    
    
  • Test results will be low depending on which form of hemophilia you have.
    
    
  • In either case, your activated partial thromboplastin time (aPTT), a measurement of the clotting of blood, will be prolonged.