Cord blood test reveals hidden impact of smoking on newborns

This study looks at how tobacco smoke exposure before birth—whether from active smoking or secondhand smoke—affects a newborn's health right after delivery. Researchers will measure a chemical called cotinine in the baby's cord blood to classify exposure as active, passive, or none. They will then compare health markers like blood gases, oxygen levels, and birth weight among the groups. No treatments are given; the goal is simply to gather information to better understand the risks.