20w scan large abdominal circumference

Ju
Very worried after my 20 weeks u/s been told baby has a large abdominal circumference that is off the chart! All other measurements are within the chart, but no one has told me what this means!? 😭 only that I will have to have another scan at 24 weeks for growth purposes, I'm so worried what it could be and does it mean my baby will be abnormally large?