12 week neck scan

Lauren
Hello all, 
Anyone who had a 12 week scan and Doctor told you that they recommend extra testing for side affects? 
My doctor at 12 weeks scan the hole in the next area that eventually closes up, and says that normal is up to 2.4 and 2.5 they get concerned. My baby is at 2.4 and they want to test incase you would want to terminate the pregnancy if anything was wrong, which I would never do. 
My question is anyone who had a baby that was in the same range and turned out perfectly healthy!? Kinda scared me today 😢