Mono/di twin help

Ka

So for those that were pregnant with mono/di twins, did you have to go in twice a week to be monitered? I just got off a video chat with my doctor and I swear she said starting at 32 weeks I would have to go in twice a week to be hooked up to a machine and have my placenta monitored. My doctors is an hour away and I wont be able to go in that much.