I always measured big at our US and the techs would always comment on her budda belly, haha. And all was fine! In fact, my last US at 37 weeks they told me she was in the 90% percentile and estimated her weight at 8lbs, 4 oz! She was born 8 days later at 7lbs, 7oz and her belly was not "huge"... so there you have it. Everything sounds just fine!