Help with the app

Monica
I am trying to figure out when to log my treatment for my <a href="https://glowing.com/glow-fertility-program">iui</a>. I had my ultra sound for this cycle on Tuesday the 3rd. Do I log that as my day one or do I log the first day of my period as day one? I need help lol I also started my gonal-f the 3rd as well.