Ultrasound has a wide range of applications, from adult bone studies to fetal heart rate monitors. It helps clinicians assess the organs and blood vessels in the abdomen (liver, kidneys, spleen, gallbladder, bile ducts, aorta and pancreas). It also helps in evaluating organs in the pelvic area (uterus, ovaries, bladder, and prostate). Ultrasound is frequently used to check for the gestational age of a fetus, as well as any irregularities of the fetus. The breast, thyroid, scrotum or any other soft tissue mass can be assessed using ultrasound, as can arteries and veins in the neck, abdomen and legs.