Ultrasound estimated weight

Carolyn
In hopes that other mommies can help me out. I just had an ultrasound 36 weeks 2 days. And they estimated he was 7lbs 2oz already. Im a ftm, and im also very small framed. She said he is in the 70th percentile. She told me not to worry that it could be off. I've only gained 20 pounds, but I lost 11 due to morning sickness and gained it back. I'm all belly and having a baby boy. Was anyone else told this and their baby not weigh around 9 at birth? Worried I wont be able to deliver vaginal, like I said I have a very small frame