Ultrasound dating is the most reliable so I would go with that one when there is a discrepancy. Further ultrasounds typically done at the mid-pregnancy point may further verify this. When it comes right down to it, the baby will come on it's own schedule and rarely is this on the estimated due date.
The answers in online forums are for information only and are not intended to substitute for medical advice and care. Please see your personal health care provider for further evaluation of your individual case.
Debbie Miller, RN