When I got pregnant with this baby, the doctor, as always, asked about the dates of my cycle to estimate a due date. Don't they always?
Then, when I had an ultrasound, the measurements of the sonogram gives its own estimated due date. In my case, my sonograms put my due date about a week later than my cycle would have.
My doctors seem adamant about using the sonogram date. I'm a little confused as to why since I've always understood sonograms to have a small range of possible error, thus making their date no more certain than mine, and at least I had specifics concerning mine.
My biggest complaint about their insistence of using the later date is that every time I use the earlier date, they suggest I don't really know when I conceived or even when my last cycle was. This really has come to irritate me. First of all, if I didn't know, why did you ask me? Secondly, when I provided a chart showing all the relevant information, it wasn't based on whims. If they really want to use the sonogram date, fine, but don't do so under the false pretense that I don't know what I'm talking about. (Ironically, if they did the math, using the later sonogram due date, I would have had to have gotten a positive home pregnancy test only 9 days after conception. ... not too likely.)
Now, of course, any due date is only an estimate and only worth so much. I find this especially true as I've never made it to any of my due dates anyway. But where this disagreement about dates is causing difficulty is in setting up appointments until then. Certain tests are supposed to be done on or by certain weeks. This has caused a bit of confusion when I think I can have the test by Date A and they insist by Date B. Of course, a test is a test, and if it makes them happy, Date B is fine, but I've had to reschedule a couple of appointments now due to the confusion. My other concern on the issue is that, as I tend to deliver early, what might be full term but early by my date, might not full term by their date. By their estimation, my next appointment is at 35 weeks, by mine, it is 36 weeks.
So what date do you go by? Have you ever had such confusion over your due date?
P.S. - Exactly when this baby arrives has become even more interesting to me based on it's relation to the two due dates. The fact that this baby is already in position and dropped so early has not escaped my attention either. James thinks this baby will be born by the Annunciation or even by his birthday the previous week. Any earlier than his birthday, and my doctors might not be so pleased with their choice of due date, though it would be fine by mine. :)