Right. Just to add...I have a friend who adopted her sister's child because he was removed from her custody at birth by the state after he testing positive for marijuana exposure (thc) in the hospital. *If* a hospital suspects drug use for any reason or sees signs of withdrawal in the newborn, they will test; a positive for exposure definitely can cause you to lose custody. FYI: If they test the baby's meconium, it can detect drug exposure in the last four to five months of pregnancy. They can use the meconium test to look for exposure to marijuana, cocaine, opiates, amphetamines and barbiturates.