An estimated 1 in 10 unborn babies is exposed to harmful drugs of abuse or prescription drugs. Dr. Gwen McMillin, professor of pathology and medical director of toxicology at ARUP Laboratories, says, "It's a growing problem in parallel to the national opioid epidemic." Dr. Kirtly Parker Jones speaks with Dr. McMillin about the use of umbilical cords to test newborns for their risk to drug exposures and the harmful effects the exposures can have on the baby.