Demek on "How many vials for IVF?"

I was just wondering how many vials your clinic required for IVF? I will be doing a split donor egg cycle, and my clinic said only one vial is required. They will also automatically do ICSI on the eggs. What do you guys think? Is one vial really enough? I just want to make sure. Also...if we do order two, and send them to the clinic...will they only use the second one if they need it?
Thanks for the help!