Moreover, it has recently been shown that some infants with apparent life threatening events (ALTE), have a smaller jaw size than their peers that did not have an ALTE. ALTEs can occur when infants are in their car seats. No studies have been found that looked to see if infants with breathing problems in their car seats also have small jaws. Furthermore no studies have looked to see if infants who fail their initial car seat challenge are at greater risk for respiratory illness during their first year of life.