Anyone been told there LO has this? My past 3 ultrasounds they have.side there's fluid in his kidneys its a small amount barley moderate and normally resolves itself. Been told he will have an ultrasound after he's here just to check.but normally resolves its self and nothing to be.concerned about. Also talked to the peditrician we will use and she said same thing and that its more common now. Anyone else showing this with there LO?