NT scan

I had my NT scan at 12w1d and was told that everything looked good. However, I got a notification for MyChart that the doctor who reviewed the scan said that “obesity affecting pregnancy in first trimester” and “uterine size discrepancy in first trimester.” Yes, my BMI is high but I’m a very healthy and active person and my doctor has not once mentioned my weight. Has anyone heard something similar from their NT scans? Any idea what it means? I’ll be following up at my next doctor appointment but of course would love to hear people’s stories/experiences.