I had a regular scan at 10.5 wks and it showed NT 4.5mm. I was very scared as there could some problem, but later at 12.3 wks NT scan it showed 2.1 mm. Both the scans where done at the same place by the same Sonologist. The gyn told that the issue is resolved on its own, also NIPT result came as low risk. Did anyone experience similar issue where NT issue resolved on its own. Still the first result of 4.5 worries me.