Nope i wouldnt do it again. I think the minimal the better. ALL of my scans have left me worried, for some reason or another. I agree with the 20week scan cause its nice to see bubs. And i guess i agree with early ones if needed, eg i have had an ectopic so had to have an early one this time.... Its a hard question but i can see why you thought that your SIL had a lot of strength!