It shows your tubes and womb to check everything looks ok, I couldnt really see the screen when I had mine done but the nurse said everything looked normal. I had another done a couple of weeks ago, this time the nurse talked me through it. This was to see what my overies/womb were like before we go for ICSI. All of my tests have come back fine. I think they have to check everything before we have any treatment. My OH had a vasectomy reversal, so we knew the prolem was with his swimmers! As im still young (28) the FS said I shouldnt have too much to worry about its just routine checks. I think your FS will send you for some tests. You do right to chase them for your appointment, I had to call a few times as Id not even been put onto the system, and we were never even given a date for a follow up appointment until I asked what was going on! Our next appointment is 17th November. They have given me a great booklet which explains everything step by step of the treatment procedure, right from your first visit to the FS.
Could you call the hospital and ask them to send you some info? I will see if I can get my hands on some when I next go.