lovepooh,
sorry that I didn't respose to your post, as I was in hospital for almost a week the week before and after back to work it was very very busy. I didn't specailly go for 4D, it was becoz my Dr. find the fluid was increased substantially suddenly, so she advised to do a 4D. Actually I didn't really know what is the difference between 3D and 4D, sorry cannot answer your questions.
Holmanma,
Thanks for your concern. I was suddenly 作早產 when I was 26 weeks, so Dr. asked me to stay at the hospital. Lucky that finally it was stablized. Now I am OK and just making effort to boost up my baby.