What is the process of drug testing a new born? do they drug test randomly or on all babies?

Varies: My delivering hospitals have lists from Child and Family Services that point out individuals with open drug investigations. When they deliver, urine from mom and baby will usually be screened and in many cases the first baby stool will also be submitted for study. I do not routinely order drug studies on babies, but any prior history of maternal drug use may require screening for medical purposes.