Check out my last article about labor signs.
Also, I don't know the stats off hand but late preg. ultrasounds are notoriously bad at estimating weight. And we know now that babies don't gain as much in those last weeks as thought. Your baby isn't big, even if it gains 2 lbs. I'd say that's good size, and either way...your body was made to birth that baby! I'd run the other way from a doc that wanted to induce on size alone (actually, I'd run from any doc who wants to induce at all). Your baby knows what he/she is doing and will come when ready. Just have patience!:)
Wishing you strength and confidence in the birth process-
Maryn
Bella Online Pregnancy Editor