My first born had laryngomalacia. We were referred to ENT and they put a scope down his nose to visualize his epiglottis…. The epiglottis is mostly cartilage when they are born and can be floppy and not open and close properly and cause a lot of stridor on inhalation. ENT said Like 95% of cases resolve on their own by age 1 as the cartilage stiffens up and becomes hard, you won’t need any intervention. It’s scary and sad to listen to but as long as they aren’t turning blue, you don’t do anything except monitor. My sons is completely resolved (actually went away at like 7 months old). However, as the person above mentioned, laryngomalacia is prett rare, most newborns are just grunters and squeakers and sound grumbly and congested which is completely different than laryngomalacia. Laryngomalacia is stridor sounding
This is the video is showed my pediatrician and she diagnosed it, with every inhale during feedings he would squeak because the epiglottis would flop closed and he couldn’t get air in properly
Totally normal, NB make a lot of weird noises when they sleep. It gets better around 3 months.