I know this probably won't help much; but my husband was born to his mom after 15 years of trying.
His mom was 44 when she got pregnant with him.
So I know, conclusively, of at least one success story (without IVF because they didn't even have it then) that took more than four years
Stories of Pregnancy over 44 years old - sharing stories I find online, for inspiration!
You Can Get Pregnant in Your 40's - Sharing articles, discussing options & suggestions