I would ask which medications and vitamins you need to stop before surgery (if you take them), and I would also ask about how endo will be managed after surgery (provided they find endo) doctors will recommend different medications/hormones based on the extent of endo and your own personal experience. Finally I would also ask about organ removal IE if they get in there and your fallopian tubes are absolutely wrecked will they remove them during that surgery or wait until you recover and plan to remove them in another surgery down the track. If you're worried about your fertility you should talk with the surgeon about how surgery will impact on it.