Emz - I had my morphology (?) scan at 20wks but then had to go back at 22wks because my GP was not happy with the quality of the report & U/S shots.

Turns out everything is fine, even though my GP also had a freak out 4 weeks ago and sent me for another scan because bubs was 'big enough' by her measurements (fundal height etc). Again, bubs measured well within the averages allowed...she tends to go through grow spurts every odd week.

I'm with Meg....just book your U/S appointment as soon as you can so you can relax when the results come back fine.