Confusion over EDD

At 7 weeks there wouldn't be much to measure.
Was your 2nd scan the 1st trimester screening?
I had my screening at 11w 6d. They said they take a measurement from babies head to bum and calculate the date based on the size of the baby. They beleive that this is the most acurate measurement. The sonographer told me that if their dates are very different from the calcuation from the last period they use their dates.
Did you say at your last scan that the dates differ from the last time it was worked out?

That 2nd scan is going to be more accurate than going from your LMP because of different ovulation dates and cycle lengths etc. Very early scans can also be inaccurate since they're so small and sometimes hard to get good measurements. I'd go off the 2nd scan dates. Not that it means very much in the long run but gives you somewhere to aim for.

Yup take the second date (and then ad about a week

Mine was very similar - I worked my EDD out to be the 10th of Dec, scan showed 19th - baby wasnt born until the 29th!

Good luck with your pregnancy

yep another here with different dates. LMP date - 3rd September (this was with #1). at 20 wk scan - 13th september. subsequently realised that yes, I ovulate late in my cycle. But also there's just variation in progress with babies.. take the later date, is my advice, whatever it is!

i was always told the earlier scan is the most accurate... especially if you have them that early.