Study of Breathing During Sleep in Infants with Micrognathia and healthy infants

This study seeks to understand why some babies born with a small jaw (micrognathia) have sleep apnea and/or trouble growing and others do not. By enrolling healthy babies, we hope to get a better understanding of how infants breathe during sleep and grow over the first months of life. This observational study involves two study visits that each include an overnight sleep study and some other non-invasive tests.