Birth defects are generally grouped into one of three major categories, structural or metabolic, congenital infections, or “other.” Being that this is such a broad break down of categories, it is made evident that not only is it unclear whether a child is born with an abnormality until various tests are done to come to the conclusion that there may be something wrong with a child. Structural or metabolic abnormalities include heart defects and neural defects where some part of the body, internal or external, is missing or malformed. Recessive genetic diseases which are diseases that result from the inability of cells to produce and enzyme needed to change certain chemicals into others to carry substances throughout the body. Most children with a metabolic birth defect do not have any visible abnormalities, but metabolic defects are usually harmful or can be even fatal. Metabolic defects include Tay-Sachs disease, a fatal disease that