Sonogram uses ultrasound waves to create a picture of something growing inside a person's body. This is a very common procedure in pregnancy. It produces black and white as well as color pictures of the fetus and is especially useful for pregnant women. Sonograms are useful to assess gynecological disorders, ovarian cysts, uterine fibroids, monitor unusual growths like tumors, internal injuries, organ malformations, etc. Apart from ob-gyn uses, sonogram can also be used to test for tumors in the kidney, liver and aneurysms of all kinds. They are the most advantageous form of medical test because of their non-invasive nature.