IUI vs TI

JEN • Married 12/31/11 TTC since 1/1/12. We suffered a mc 12/23/14 :( started 2015 we did injections, still BFN, did 1 IUI BFN finally moved to IVF (long lupron protcol) in Sept. BFP! EDD 07/17/16
Just finished my tww from my first <a href="https://glowing.com/glow-fertility-program">IUI</a>. And it was BFN. I don't get it, hubs sperm was great 50 million post wash 100% mobility. So now is it worth it doing another round of <a href="https://glowing.com/glow-fertility-program">IUI</a> or just doing TI. We are gonna do <a href="https://glowing.com/glow-fertility-program">IVF</a> in October, if not pregnant in sept.