Substance use during pregnancy and the postpartum period affects a growing number of families across Washington State and the nation and presents complex public health challenges for families, infants, healthcare providers, and care systems. Infants exposed to opioids in utero may develop Neonatal Abstinence Syndrome (NAS)/Neonatal Opioid Withdrawal (NOWS), a group of withdrawal symptoms in infants that can include difficulty feeding and sleeping, irritability, and trouble being soothed. At the same time, pregnant and postpartum individuals with substance disorders often face stigma, fragmented services, and significant barriers to treatment and supportive care. Improving outcomes for families impacted by substance use requires not only effective treatment for infants and parents, but also better caregiving support, provider training, and systems of care that facilitate comprehensive support for families.