Anna is a 35-year-old woman who has just undergone a minor surgical procedure. Post-surgery, she starts experiencing unusual bleeding and bruising, which prompts her doctor to investigate further. Anna has no known history of bleeding disorders, but her family history reveals that her mother and maternal grandmother had similar issues. To understand Anna's condition, her doctor orders a series of blood tests, including prothrombin Time (PT), Activated Partial Thromboplastin Time (aPTT), platelet count, and coagulation factor assay. The results are as follows: Prothrombin Time (PT): Prolonged Activated Partial Thromboplastin Time (aPTT): Prolonged Platelet Count: Normal Factor VIII Activity: Reduced Factor IX Activity: Normal Von Willebrand Factor (vWF) Antigen: Reduced
I. Based on the test results and family history, what is the most likely diagnosis for Anna?