thank you for your query.
Normally fluid is seen in the stomach, which is a normal finding.
However, if it is excessive, it maybe associated with certain conditions.
Generalized edema ( hydrops ) is associated with increased fluid in the cavities, including abdomen.
Prune belly syndrome
could cause such a picture.
Also, duodenal obstruction
or atresia is a cause.
Unfortunately, you cannot form an opinion based on just one description.
The entire ultrasound
report and other findings would go hand in hand towards forming an opinion.
Kindly get back with that.