URMC / Encyclopedia / Collection External and Internal Heart Rate Monitoring of the Fetus Factor I Factor II Factor IX (Antihemophilic Factor B) Factor V Factor VIII (Antihemophilic Factor A) Factor X Factor XI Factor XII Fecal Fat Fecal Occult Blood Test (Guaiac-Based) Femoral Popliteal Bypass Surgery Ferritin (Blood) Fetal Fibronectin Fetal Ultrasound Fiberoptic Endoscopic Evaluation of Swallowing Fluoroscopy Procedure Fluphenazine Drug Level (Blood) Folate Follicle-Stimulating Hormone Foraminotomy Fragile X Syndrome (Amniotic Fluid) Free and Bound T4 Free and Bound Triiodothyronine (Blood) Free Androgen Index Free Light Chains (Blood) Free T4 Free Testosterone Inferior Vena Cava (IVC) Filter Placement