More than 90% of pregnant individuals will use at least one medication during pregnancy, and at least half of those who breastfeed will continue to use medications. Despite this, there remains a paucity of data on the safety of drugs in pregnancy and lactation. Dr. Zipursky’s research uses population-based administrative health data to investigate the maternal and neonatal safety of drug use in pregnancy and postpartum. One of his primary interests is investigating controlled substance use in pregnancy and lactation.