What is the best prenatal supplement for a woman with Crohn's disease?

I have Crohn's disease

Thank you! I have an additional prescription for 5mg of folic acid, and as for food, my diet is very limited because of my Crohn's disease. Almost no fruits and vegetables, always cooked, as little fiber as possible, etc. When I see the doctors they always ask me what brand I take, so I was wondering if some brands have a more interesting composition. Thank you!