The Common Breathing

Hiccups (babies are prone to hiccups, which often begin while they are still in the womb)

Snorts (especially when your newborn is in deep sleep)

Whistling (a newborn’s nasal passage is narrow, so you’ll often hear whistling as they draw in a breath)

Website: https://www.verywellfamily.com/common-newborn-breathing-sounds-284379#:~:text=Normal%20Breathing%20 Noises,-After%20some%20time&text=Hiccups%20(babies%20are%20prone%20to,they%20draw%20in% 20a%20breath)