My periods are regular as clockwork and I've not had one since 13th March. If I trust the dates should I be worried that my baby appears to be 5 weeks smaller than it should be? How likely is it at this stage that it could just seem smaller due to positioning etc?
My sonographer was 3 weeks out with my last pregnancy. I knew the first day of my last period, am regular as clockwork, etc. Sure enough, baby came 'early' (although not really) and was massive, so try not to let it worry you too much. Everything might be fine at your next scan.