A small study of mothers and their newborns found one quarter of those who tested positive for marijuana use also had evidence of other illegal drugs: 11.6% were positive for opioids, 10.6% for amphetamines and 6.5% for cocaine. Data was collected from 2006 to 2010 in an urban teaching hospital with 5000 births per year. About 10% of these tested positive for marijuana use.
PositiveTip: Encourage pregnant mothers to avoid marijuana and other illegal drug use for the good of their unborn infant–and themselves.