Re: 3D/4D Ultra sounds....
They really are kinda silly, IMO. I got one for free because my hospital had just received the equipment and wanted to try it out. The 3D/4D US are best for earlier in a pregnancy. The fetus has to be COMPLETELY surrounded by fluid to get a clear shot. If the fetus is up close to any part of your body it's difficult to get a clear shot. So if you are very far along it is near impossible to get a clear shot of anything at all.
There is NO way I'd pay for something like that. You are just seeing a 3D/4D image of what you see in the 2D ultrasounds. You can't really tell what the child looks like and/or the images are rather distorted. They are really overpriced IMO.