Hi Whitetiger - each doc will have own style but generally they will run through the cycle & explain how it went (ie. did the initial BT look ok, were growth during stim normal or slower, physical quality of embryos, any visible problems noted wiht embryos or lining or during ET) then move on to discuss option for next step (FET or fresh, to make changes or not changes to protocol & why, FET procedure, any further tests he would recommend before next cycle, etc). If you have questions, try to list them down and bring them along so that you can go back to this list if you find after doc's explanation that some were not yet asnwer. My doc also does a scan when I go and sit and cry in his room, to check if the ovaries & lining have gone back to normal.
If not mistaken, you did d5 ET ya so your embbies probably were looking quite strong to get that far.
In most cases, esp the first cycle, the doctors really don't know why embbies didn't implant. That part for now is all still in God's hands. Perhaps to focus on discussing what to do differently for next cycle.
If you are near this month's O date, may also ask doc during the scan to check if you have ovulated this cycle as often the cycle after BFN becomes haywire (or maybe even opportunity to time for natural bfp).
Don't give up, ya. Take your time to find some peace emotionally. Sometimes it just takes a few tries before BFP or before they can know what is wrong.. Hope this helps.