Just wondering

A little back story I am 42yrs. I had a reversal done back on March 2018. Had a chemical in September and a 6w 2 day etopic pregnancy along with my right tube removed this past March. Ob said to get aggressive with trying to conceive because of my age so I am doing my first

IUI

. I only had one scan done at cd 9 and RE said I have 2 follicles left side 14 and 11 and right side 1 follice at 14 and I have been on femara 7.5 mg cd 3-7. I was told to do my trigger on today cd 13 and

IUI

tomorrow on cd 14, but my question is most people I read about have more than 1 scan to see how follice are growing is it normal to only have 1 scan?

Update: Had first iui at 11:00 today 7/17 had 218 million swimmers keeping hopes up that this works now have the dreaded 2 ww. Baby dust too all trying.