Catherine O'Neill BuckView profile
Assistant Professor
Overview Catherine O'Neill Buck is an Assistant Professor in the Department of Pediatrics, Division of Neonatal-Perinatal Medicine at Yale School of Medicine. She is a neonatologist and clinical researcher focused on maternal metabolic health during pregnancy and its influence on infant growth, body composition, and neurodevelopment. Her work bridges clinical care and translational research, with a particular emphasis on preterm infants and obesity prevention. Education & Training MD: University of Connecticut School of Medicine BS: University of Connecticut (Molecular/Cell Biology and Spanish) Pediatric Residency: University of Texas Southwestern Medical School (2015) Neonatal-Perinatal Medicine Fellowship: Brown University/Women and Infants Hospital (2019) MHS (Clinical Investigation): Yale School of Medicine (2025) Research Focus Dr. Buck's research investigates how maternal metabolic conditions (e.g., diabetes) and early neonatal nutrition affect preterm and term infants' growth trajectories, adiposity, and long-term cardiometabolic health. Key areas include: Adipokine and metabolite profiling in newborns Ultrasound-based body composition assessment in preterm infants Optimizing nutritional protocols for preterm growth Impact of maternal diabetes on neonatal morbidities Clinical Trial Principal Investigator for the trial Preventing Obesity in Preterm Infants (HIC ID 2000031084), exploring strategies to mitigate obesity risks in preterm populations. Labs/Teams Leads the Yale Neonatal NOuRISH Team , focusing on nutritional and metabolic interventions for neonates.









