"50–70% of mothers who take opioids during pregnancy will give birth to a baby with NAS."
In 2010, East Tennessee Children's Hospital put its NAS treatment process in place. Each NAS baby gets evaluated using the Finnegan Scale, a scoring system of 20 symptoms that helps the clinical staff determine the proper treatment for weaning the child off of drugs. If the symptoms are severe, the babies may be treated with small amounts of morphine, chosen because it leaves the system relatively quickly.
Read more here: http://bettertennessee.com/etch-nas/