RecruitingDevice studyGrowing Little PEAPODS StudyThe goal of this clinical trial is to learn more about how the food and nutrition babies receive while in the Neonatal Intensive Care Unit (NICU) influences their ability to gain weight and fat-free mass, and their future growth and development. Participants will: * have body growth measurements collected using the PEAPOD device * have nutritional information collected, and * be followed for neurodevelopmental outcomes Participants can expect to be in the study for 36 months.