The squeaking is called stridor. Two possibilities: either the baby has 
not yet got the timing right for coordinating swallowing and breathing, 
and fatigues through the feed, until she misses a swallow and draws milk 
down to the level of the vocal folds (this would cause stridor as the 
folds snap shut to try to keep milk out while the baby is trying to 
breathe in). Getting milk to the level of the vocal folds is called 
penetration. Usually the stridor of penetration is very brief (2-3 seconds).

Another possibility is that the baby has a respiratory anomaly, one that 
narrows the airway. This causes stridor, often during feedings because 
babies need to breathe harder during feeding to get enough oxygen to do 
the work involved in feeding. The greater effort of breathing puts more 
stress on the unstable airway, which narrows more due to the pressures. 
The stridor from respiratory issues like laryngomalacia or 
tracheomalacia usually lasts longer than that from penetration.

In either case, short very frequent feedings with baby prone and mom 
reclined may help the baby get more food with less stress.

Catherine Watson Genna, IBCLC

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