38 weeks and measuring 34 weeks

Patient: I am 38 weeks and BPD/HC are around 33 and 34 weeks ­čÖü What does this mean?The HC is 307.4 mm and the BPD 85.3 mm which corresponds to 34+ weeks though i am 38 weeks today. Does these measurements have anything to do with brain development? They fall under 2.4th percentile. AC, FL and EFW are normal.