Measuring behind


I am 35 weeks 2 days and had a growth scan today. Baby is measuring behind at 3lbs 15oz. The doctor said everything looks good and I will have weekly scans to make sure the placenta and umbilical chord are supplying baby with the nutrients it needs. My husband and I are both small people, so we expected our child to be small as well. Has anyone measured behind around this time and their babe put on a little more weight before delivery?