Ok so this is my 4th baby so you'd think I could answer my own question!
I know the date of my last LMP is 23rd of November and I pretty much know when I ovulated, which makes me due 30th August. My periods were pretty regular!
My scan however said I am actually due 24th August! That's a whole 5 - 6 days earlier than I thought! How is that possible? Which date should I be going by!
I'd go by your LMP, also, for the same reason as Calluna. The scans can be out, it happens. With my DD the early scan showed a due date 6 days later than my original - and our dates were solid since we did IVF. In my case, since I seem to have long gestations, it was handy to go with the scan EDD, since it was later. I would pick a date that suits you better and stick with it.
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