Originally Posted by
atomic sagebrush
Doctors do not like to put your baby through extra unnecessary scans (nor charge people/insurers for them) for no good reason. There is literally no reason to have another scan and I would not have another one. While we believe ultrasounds are safe, most doctors prefer to err on the side of having the minimum amount required to ensure baby/mama's health. A small variance in due dates is NOT a requirement for a healthy baby/mama. Your doc will have lots of clues about whether or not you're getting close to delivery and for all you know you may end up needing another scan later and can clarify.
Not to mention if your baby is just on the larger side for whatever reason, it wouldn't tell you anything anyway!