Remember the 12-minutes time constraint. Carefully choose what you want to say and limit your slides to the number necessary to deliver that message. Give people enough time to assimilate the information on each slide. Your audience is intelligent but less familiar with your specific research. Delivery of the oral presentation Oral presentations have slightly less than 15 minutes to do everything.
Time is very limited, and precious, it is important that it be used efficiently.
If you run over the 12 minutes a bit there will probably be no time left for questions to be permitted. The Session Chair, not the speaker, will ask for questions from the audience if time is available. You will not be allowed to run over 15-minutes. The Chair of the session will set the timer to go off at 11 minutes and then stand. Slides can be organized in the slide preview room prior to the talk.