Girls, how much did your babies weigh at 31-33 weeks? I had an ultraso…

Girls, how much did your babies weigh at 31-33 weeks? I had an ultrasound yesterday, he weighs 1800 pounds, they said he's thin, but the tests, placenta and blood are normal. They said it's because of the diet, allegedly that I eat little meat. But my relative gave birth with such weight at 34 weeks and they said it's supposedly normal. Last time on ultrasound they said short and plump, this time tall and thin, in short, I'm confused.