We had lots of scans because of placental blood flow issues. They said she had chubby cheeks and was on the 80-90th percentile. When she was born she was 3.2 kg and only on the 50th percentile. The percentile measurements are really an estimation, they will be charting the changes over time. Are you a small person? What about your family?
DD now has a head at almost the 100th percentile and weight and height on the 75th. So that's spot on for our family.