Small stomach

Is there anyone who has experience with being told that their baby has a small stomach and you also have Polyhydramnios or not?

My baby has a heart defect and a part of her brain which is prominent . Now today the doctor has said her stomach appears small I’ve done research and seen that this can be associated with the Polyhydramnios but can’t get much info about it. She also is at risk for having di George syndrome but waiting till birth to test and see if she has it.