Pregnancy & AVM

Hi All-I had posted here a couple of months back regarding the possibility of my AVM returning in my lower right tib/fib. A week before my appointment I found out I was about 4 weeks pregnant, which has brought up some complications with my treatment. My surgeon would like to go ahead and remove the AVM before my first trimester is done (which is only four weeks away). The MRA that is required pre-operatively is what concerns me the most though. Has anyone had an MRA done while pregnant, and any suggestions about waiting or going through with the procedure? Thank you.