Progesterone Levels Question (newbie)

So my wife went in today to get her progesterone levels checked and she's at 15(whatever that means, sorry). Is this a good thing? We had IUI's performed on back to back days last week 08/06 & 08/07. Before that she was on what I believe was clomid for 5 days and then she had a trigger shot on the next day before the IUI's. I'm crossing my fingers either way. Thanks!