Should I do another IUI with glonal F

I'm 34 and have been TTC for 5 years. Unexplained infertility. I have had 3 IUIs with Clomid and nothing. Doctor wants me to do another <a href="">IUI</a> with injectables but I really want to go straight to <a href="">IVF</a>. The doctor said he wants me to do it just to see what my ovaries do but I think it's a waste of money. Should I do one more <a href="">IUI</a> or go to <a href="">IVF</a>? Meeting Wednesday to talk to doctor about it.