Hi all. I am 26 weeks pregnant with Mono/Di twins. My OB has recommended ultrasounds every 2 weeks from now on to watch for twin-to-twin transfusion. So far babies are exactly the same size. I have already have been having ultrasounds every three weeks since 18 weeks pregnant and feel torn inside about what to do. I have some reservations about the frequency of the ultrasounds and I don't really understand if the actual risks of ultrasound. I also realize that twin-to-transfusion is a serious thing and don't want to be irresponsible and ignore the benefits of technology. Any advice or others experience with TTT/ultrasounds and Mono/Di twins.