Also, just because your belly is measuring small doesn't necessarily mean baby is small! I measured not even 30 weeks when I was induced and ultrasound only said she was about 3 or 4 pounds, but two days later she came out 6lbs 12oz and longer than average!
I was induced at 39 weeks because my girl was small but I honestly don't recommend it. It was horrible. Plus babies do a lot of growing in that last little bit so it could give her a chance to catch up!