86 patients with Abdominal Aortic Aneurysm was assessed by abdominal ultrasound with respect to growth rate. For aneurysms with diameter 3-4 cm, mean growth rate was 0.215 mm per month, for aneurysms 4-5 cm was 0.33 mm per month and for aneurysms with AP diameter bigger than 50 mm the mean growth rate was 0.78 mm per month.