Has anyone ever use Letrazole without monitoring?

Hello Glow family! 3 years of being impatience has gone by and we are discussing going the IUI route again. I loved Letrazole because it always gave me two follicles. Everything else about me and hubby are normal, just unexplained fertility. My doctor called it in again today and if we do the IUI again it's about $1,000 each time. I have a refill on my script, so I'm wondering since I'm healthy can I just try Letrazole without the IUI and monitoring they have to do? Of course the Dr. says they want to monitor, etc. but what if we can do it naturally with the help of Letrazole? Anyone else ever taken Letrazole without being monitored? Should we keep trying IUI? Try without IUI and just the meds? Thanks for your help!