I've done the structural u/s at TKO Hospital last Thursday (at that time BB was 18weeks4days).
It took around 20mins for the scan, the doctor said the organs of BB are growing well & healthily. But the size is bigger/longer than the normal range,.......BPD, AC, FL, all measurements are nearly 20weeks4-5days (2 weeks bigger than the average size).
The doctor said maybe the Expected Delivery Date is not accurate and baby is really growing fast.
BTW, my tummy is not that big.......but BB is bigger than normal.