So, all along I have known (based on conception and tracking ovulation) that my due date is 12/21. My early ultrasounds confirmed this date. But my OB's office that I switched mid-pregnancy (b/c we moved) to has my due date as 12/18 based on LMP.

I guess it doesn't really matter in the end because the baby will come when he comes. The only thing is I am at risk for preterm labor and do have contractions so today my doc was like, "great you are 34 weeks!" and in my head I'm thinking, no not yet. Also, the baby is measuring small so I'm being followed closely and I feel like their percentiles are always off because based on a different gestational age than he really is.

Would you start going by their due date? Or take the who cares approach? My last pregnancy my LMP and real due date lined up so I didn't have this issue.