How would you characterize the above case? Laryngomalacia. For most healthy, thriving infants who present with inspiratory noises that began in the newborn period, the diagnosis is laryngomalacia; most common cause for newborn stridor. The cause is “floppiness” to the structures in the glottic area. The stridor may not began right away and may start around 2 weeks of age as the child begins to inhale more vigorously. These children with have a normal cry and feed well. The noise is present in the awake or agitated state and may go away while sleeping. While it will generally resolve on its own, it may take 12-18 months to fully resolve.