The laboratory findings in haemophilia will be as follows.
APTT (activated partial prothrombin time) -prolonged
PT (prothrombin time)-normal
BT (bleeding time)-normal  or increased 
Factor VIII-C- low
Factor VIIIR:Ag [von Willebrand factor] and factor VIIIR:RCo [Ristocetin cofactor]-normal
- Crispian Scully, Roderick A. Cawson Medical problems in dentistry page 142 5th Ed.