The study is to measure how dense or solid the infant's bones are using a new ultrasound
machine and how that density changes over time.
premature infants weighing less than 1500 gms and less than 33 weeks gestation are eligible
for the study
- premature infants born less than 33 weeks, weighing less than 1500 gms
- congenital anomalies weight greater than 1500 gms