According to the California Newborn Screening Program, between July 2005 and July 2009, approximately 18 newborns were detected with PKU, 70 newborns with cystic fibrosis, 125 newborns with sickle cell disease, and 275 newborns were identified with primary congenital hypothyroidism annually. (How 2014) .
The results of genetic testing can also be used by researchers and scientists through a database. Having information on thousands upon thousands of different genes, scientists and researchers are able to develop treatments and cures for different diseases that will benefit affected individuals and future affected patients. Most importantly, genetic testing provides knowledge. Based off on genetic screening results, individuals will know their possibilities and can adjust their life accordingly. For example, a male in his late 20's who has a family history of Huntington's disease (HD) decides to get tested for genetic markers for HD. If results show that he has a chance of developing HD, although there is no cure, him and his family can prepare themselves mentally, emotionally, physically, and financially. If results show that he has a normal range of the DNA sequence CAG and is not likely to develop HD, then he would be able to have normal children (assuming that his wife also does not have HD). Although some genetic disorders do not have cures but only treatments, having prior knowledge of one's genes can help make smart lifestyle choices and possibly increase their lifespan. Nonetheless, there are many genetic disorders that be preventive (due to environmental factors) and if symptoms are detected early enough, an affected individual can carry on a normal life with proper treatment, medication, and or special diets. .
However, those same pros can just as well be cons to most people and some ethical issues are brought up with genetic screening. Having prior knowledge can be an emotional and mental strain on individuals.