Accuracy of ultrasound at guessing weight of baby?

I've heard so many people say the doctors guessed the baby's weight by ultrasound and were off by 2 lbs or so. They think my baby weighs 10lb 4oz now. I'm 4 days past my due date and baby has measured at least a week ahead from my first ultrasound. They said it could be off by a pound. How many of... show more I've heard so many people say the doctors guessed the baby's weight by ultrasound and were off by 2 lbs or so. They think my baby weighs 10lb 4oz now. I'm 4 days past my due date and baby has measured at least a week ahead from my first ultrasound. They said it could be off by a pound. How many of you were told your baby would be this big and it was much smaller? And were any told baby was this big and it was bigger?! Women who have delivered 10+ lb babies, did your baby have shoulder dystocia?
7 answers