I'm just sitting here wondering if sometimes when ladies go over their due date it's because the due date was initially slightly out? I don't really have a LMP to go by, I got pregnant the same month I had the mirena coil out, however I did have a bit of breakthrough bleeding at that point, which may well have been a period I guess.. and if that date had been used as my LMP my due date would be March 9th, not March 16th (as my 12 week ultrasound dated me) Do you think that using LMP sometimes dates you further along than you are, possibly due to some women having longer cycles and NOT ovulating 14 days after their LMP? Causing more ladies to go 'overdue'? As I know if there is only a 1-2 week difference in the dates the doctor initially gives you and the dates the ultrasound say, they leave it as the doctors dates. I'm slightly hoping that March 9th would have been my original due date, so even if I go a week over that, I'm still at the due date I've been going by... thereby not being 'late'! I'm sorry if this made NO sence lol!