Starting IUI and need advice

Hi ladies, just got back from my RE appointment. Went over all my numbers. Turns out, of course, I'm the problem. Low ovarian reserve and my eggs are aging faster, hubby's levels are fine. He recommends starting IUI right away. Now to decide what drugs to take. For those of you who have done this what did you use or did you have success with one or the other? He's recommending I take femara or do shots of follistum. Any advice is Greatly appreciated!!!