Babies make a variety of strange Baby Sounds, whether asleep or awake, and this is quite normal. Most of these are due to the immaturity of her respiratory system and will soon disappear.
Snoring Your baby may make some grunting noises when she’s asleep. This is not a true snore, and is probably caused by vibrations on the soft palate at the back of her mouth as she breathes.
Snuffling Your baby may snuffle so loudly with each breath that you think she has a cold or that she has mucus at the back of her throat. In most babies, these snuffling noises are harmless and are caused because the bridge of the nose is low and air is trying to get through very short, narrow nasal passages. As your baby grows older, the bridge of her nose will get higher and the snuffling sound will gradually disappear.
Sneezing You may also think your baby has a cold because she sneezes a lot. In fact, sneezing is common in newborn babies, particularly if they open their eyes and are exposed to bright light. This sneezing can actually be beneficial – it helps clear out your baby’s nasal passages.
Hiccups Newborn babies hiccup a lot, particularly after a feeding. This leads some mothers to fear that their baby has indigestion, but this is rarely the case. Hiccups are due to imperfect control of the diaphragm – the sheet of muscle that separates the chest from the abdomen- and they will disappear as your baby’s nervous system control of the diaphragm matures.