Obviously we can find out the gender. :P
We're interested in finding out where the placenta is. Last time, the doctor who delivered my son (after transferring to the hospital at the last minute) told me that he thought the placenta had grown into my old c-section scar from my first baby. I was in the middle of labor, so I didn't think to ask for an ultrasound to check. I had a c-section, but then the doctor never mentioned the placenta again. (I didn't ask because I figured there were no more decisions to be made about it, and I thought that was our last baby.) If we find that the placenta is attached over the scar, can you actually see if it's growing IN to the scar? How likely is that to happen? If you can see for sure that it has happened, how likely is it to be a problem?
I know that they measure the amniotic fluid, but I don't know how to interpret that information, or how important it is. As far as measuring the baby, all I know is that they measure the baby and look for problems. I don't know specifically what they are looking for, or how likely those things are to be problems.
What else can we find out? What questions should I ask? What things should I not worry about, because they aren't likely to be problems at this stage (like, for example, I know not to be concerned what position the baby is in this early on)?