Audrey, congrats on ur bb boy! ^5
Usually sonographer very 'serious' one leh.. few times i went for scan, not for bb purposes, their faces are all 'stoned'. No reaction at all! Haha.. so we dunno if they are bearer of good news or bad news..lolz
I agree that DS is more to scan the bb growth and everything is in place etc..brain growing well (enuf grey matters bor), spinal is growing, fingers, toes everything in place, heart got 4 valves..but thr are things which cannot be scanned lar like my #1, after born during routine checkup found he got heart murmur, usually is because the valve wasn't closed properly during breathing time..but they will be ok 6 mths later. This kinda thing hard to predict lar..