My friend had a scan the other day and the measurement was 6mm. Went again today for a CVS and the measurement this time was 4.6mm. I know that is still high but was wondering what experience others have had of this. She's torn between being hopeful and thinking the worst ie. if it's not downs or another chromosome disorder then it will be heart problems or something else. She has to wait until friday, maybe monday to get the results.