Amniosentisis necessary?

Shannon • S♡McD♡

Drs are pushing for an amniosentisis because my nuchal fold measurement was 2.57mm. This is within normal range just on the high end. My bloods and scan results all came back very low risk for any chromosomal abnormalities. They said they would be looking for possible heart or lymphatic defects. I'm not sure this is necessary, any thoughts?