As the number of pregnant women using opioid drugs continues to rise, questions have been raised about the long-term health effects on children exposed to these drugs in the womb. Researchers at the University of Maryland School of Medicine now have preliminary but striking evidence that suggests that such exposure can cause long-lasting impairment in the brain’s ability to process sensory information. These impairments may give rise to autism, attention deficit hyperactivity disorder, and substance use disorders during adolescence. The landmark study, recently published in Journal of Neuroscience, used a preclinical model to study the issue and found that newborn mice exposed to the opioid fentanyl in the womb developed withdrawal symptoms and sensory processing disorders that lasted at least until adolescence.