Have just had 20wk scan and pretty much all of the measurements are very low (not on scale) after normal 12 week scan previously. Have to see consultants for more scans and possibly amnio tomorrow but we are being told that causes could be growth restriction (but they say unlikely for it to be this obvious at 20 wks) or more likely some form of dysplasia such as achondroplasia. Anyone experienced any of this? What was outcome for you please (good or bad).