How many rounds of IUI before IVF?

Ty

I’ve been reading so many unsuccessful <a href="https://glowing.com/glow-fertility-program">IUI</a> stories (I know I should stop) and it’s starting to discourage me. How many rounds of <a href="https://glowing.com/glow-fertility-program">IUI</a> should I do before just moving on to <a href="https://glowing.com/glow-fertility-program">IVF</a>? I don’t want to waste my time nor money on something that won’t work. Advice?