Deciding to move on to ivf

Be
Hi ladies. I have infertility due to a Hashimoto's thyroiditis and we have been ttc  for 16 months, 9 months of that at the RE. I have had three cycles of clomid and got pregnant on two of them (one natura and one <a href="https://glowing.com/glow-fertility-program">iui</a>) but miscarried both, one at 9 weeks due to chromosomal abnormalities and the most recent at 4 weeks either due to the hashimotos or an immature follicle.  Our RE recommended two more cycles of <a href="https://glowing.com/glow-fertility-program">iui</a> and if not pregnant move on to <a href="https://glowing.com/glow-fertility-program">ivf</a>. I've already started this cycle and am on clomid but am really considering just going for <a href="https://glowing.com/glow-fertility-program">ivf</a> next cycle instead.  How did you ladies know when to move on to <a href="https://glowing.com/glow-fertility-program">ivf</a>? Or should I just do the <a href="https://glowing.com/glow-fertility-program">iui</a> first? Thankfully cost isn't a factor as we've been saving for a house for years and can use that money for <a href="https://glowing.com/glow-fertility-program">ivf</a> instead.