Post-Vent, the Sequelae: Personalized Prognostic Modeling for Consequences of Neonatal Intermittent Hypoxemia in Preterm Infants at Pre-School Age

This study is following up on premature babies who were part of an earlier study (Pre-Vent) to understand how episodes of low oxygen levels in the NICU affect their development and health when they reach preschool age. **You may be eligible if...** - Your child was previously enrolled in the Pre-Vent research study - Your child was born before 29 weeks of pregnancy - Your child is under 7 years old at the time of enrollment **You may NOT be eligible if...** - Your child was withdrawn from the Pre-Vent study - No physiological data was recorded for your child in Pre-Vent - Local regulations or your family's preferences do not allow re-contact - Your child was enrolled at Washington University St. Louis (not a participating site) Talk to your doctor to see if this trial is right for you.