IVF while on suboxone

Dose anyone no if I have to be all the off suboxone before I can start IVF I'm only on 4 msg my doctor put me on suboxone because I decided I didn't want to take painkillers anymore for my back an I got really sick doctor said that because he had me on painkillers for my back for so long my body was use to them I was just wondering if anyone knows it I have too next month I'll be down to 2mg after that I'm done