Chances increase w/IUI over time?

Kimberly • TTC for 6yrs; 6 failed IUIs; 1st FET IVF 10/13/17; BFP 10/23/17. 👶🏾 👶🏾 born 6/11/18 I’m deleted the app but please reach out to me on FACEBOOK if you have questions. I’m here for you! 4.9.19
So my Dr. and nurses have casually said more than once that IUIs don't typically work on the first time. Are they saying your chances increase the 2nd time and each fine after? My first <a href="https://glowing.com/glow-fertility-program">IUI</a> failed and I'm on the same exact plan for the second so I'm wondering if my chances are supposed to magically increase. Will ask my Dr. in the morning but curious to hear what you've heard too!