My EDD as measured by LMP was 20 December. At my 12-week scan, the date was adjusted to 23 December... and remained so until a couple of weeks before Christmas, when the midwife moved it forward to 20 December again.
When I asked why, she said that setting the EDD at 23 December had been a mistake, and that when there was less than 7 days between the LMP and 12-week scan dates, they stuck with the former.
Has anyone ever come across this? Because I hadn't. The antenatal clinic in our area takes place on a set afternoon every week, and I couldn't help noticing that the "new" date meant that everything slotted in far more neatly with the clinic dates over the holiday period.
Or am I doing my midwife a disservice?
Either way, it's only 3 days and it didn't seem to matter... until baby decided that she was perfectly happy where she was, thank you very much! I went in yesterday for a stretch and sweep, and an induction was booked at the local general for 2 January - when I will be either 40+13 or 40+10, depending on which due date you go by.
I have a couple of questions here. The first is that I'm keen to avoid induction/drip/bed/continuous monitoring/epidural/increased risk of instrumental intervention if at all possible, for all the reasons that have been set out on other threads within this forum. If I get to the weekend (31 Dec/1 Jan) and there is still no sign of baby coming on her own, is it reasonable to call the hospital and cancel or postpone the induction? Perhaps ask if I can go in for a second stretch & sweep instead? (There isn't another antenatal clinic in the meantime, so I can't have another one here.)
Also, I feel under pressure from my midwife and from DH to go and have this induction (Midwife: "I had the drip and it was fine...Trust me, by 2 Jan you will just want this baby out." DH: "If that's what they think is best, you should do it"). But to me, that 3-day gap between 40+10 and 40+13 suddenly seems massive! Especially as baby is apparently very low down and could go at any time. So which date is right?
Sorry for the long post. Tbh I feel crap and befuddled right now, and my hope beyond hope is that labour kicks in on its own! 
I know that there are no rights or wrongs or certainties - but if you were me, what would you do?