MC cause of intermittent stridor in a 10-day-old child sholy after bih is:
Laryngomalacia is the most common cause of inspiratory stridor in neonates. The stridor in case of laryngomalacia is not constantly present, rather it is intermittent. So laryngomalacia is also the M/C cause of intermittent stridor in neonates.
Laryngomalacia
Foreign body
Vocal nodule
Hyperophy of turbinate