Stacy,
at the moment, I am not so excited about the gender of my junior as I have something else on my mind. Besides, my hubby is happy with either a girl or boy, so does my family.
As for 3D scan, Dr Douglas Ong at Mt E will take walk in cases. He has 4D scan too. But Dr Loh told me that 2D scan is good enough to detect any problem and 3D/4D scans are quite expensive. Unless necessary, otherwise not encouraged as so far, no proof in regard to whether there is any side effect on the baby from these scans.