To determine whether you fibrinogen level is adequate to allow normal blood clotting; to help diagnose dissminated intravascular coagulation (DIC),to help determine whether you have an inherited fibrinogen deficiency or abnormality; sometimes to help evaluate your risk of developing cardiovascular disease. When you have unexplained or prolonged bleeding, an abnormal prothrombin Time (PT) or Partial Thromboplastin Time (PTT) test, or have a relative with a hereditary fibrinogen deficiency or abnormality; when you doctor wants additional information to help evaluate your risk or developing heart disease.