Why anomaly scan is important during pregnancy ?? During the scan we examine each part of the fetal body, determine the position of the placenta, assess the amount of amniotic fluid, and measure fetal growth. Special attention is paid to the brain, face, spine, heart, stomach, bowel, kidneys, and limbs. The main purpose of the anomaly scan is to assess the pregnancy thoroughly and determine the presence of any rare conditions including those of the brain, spine, and heart.