I also did IUI with progesterone support this cycle.My RE told me that if my pregnancy test is negative
14 days after IUI, I will stop progesterone as it will delay my period. I know from your old posts that you are in St. Louis? I am also in St. Louis. Which clinic are you in? I wonder if you are interested in exchanging information.
Sorry that I did not type Chinese.
Good luck to you!