what is a sonogram used for?
 To observe the growth of a fetus, to calculate their age and due date, to see the presence of multiple fetuses, used to diagnose internal problems such as pelvic bleeding, to locate cancerous cells, used in industry to measure the purity or uniformity of liquid, to measure the depth of water, to search for underwater objects, imaging of the location of the tip of a catheter in surgeries and to create image of some part of the inside of the body. 