Thank you for your query
is a operator dependent procedure and occasionally can be missed by the ultrasonologist. Stomach bubble sometimes is migrated into the chest in a condition called congenital diaphragmatic hernia
. But it would have been picked up if your baby had undergone any chest X-Ray. There is no link between non visualized fetal stomach and spinal muscular atrophy
. And yes the sounds that you hear may be due to a reflux. Nurse your child in a upright position. Make him sleep on a car chair. Burp him properly. If it persists, consult a pediatrician
or pediatric surgeon.
Hope this helps
God bless you.