how reliable are edds by scan only?

[mummypig]

Hi, I have my due date estimated only by a scan a few months ago, but all of my pregnancy symptoms, fundal height etc have me being a few weeks ahead of that. Has anyone else had this problem? Getting kinda paranoid now as dd is 6 wks away by scan but it feels a lot closer. Getting really uncomfy now and the good old tell tale facial puffiness etc has begun. xx

[Skyblueboston]

So how many weeks are you supposed to be?

Fundal height can be inaccurate by two weeks either way.

If you are over twenty weeks thy measure the baby crown to heel which is accurate.