Due date change at 20 week scan!

[Stace27]

Just wondering if anybody has had there due date altered at 20 week scan.
I'm due my 20 week scan next and feel so much bigger this time than my last 2 pregnancys.
I also had a 4d gender scan at 16 weeks and baby looked really developed.
Thanks in advance :-)

I think they only change the baby's due date at 12 week scan as babies develop at the same rate up until that point, after that there are too many variances.

I've never heard of it, they should date the pregnancy at the 12 week scan as that's when differences in development show. A big baby at 20 weeks is probably just a big baby!