Tricare Prime & infertility

I have been going to a fertility clinic for a few months now and the next step is to do the HSG test. I have heard so many mixed answers if this procedure is covered or not. I have a friend who asked her fertility clinic to bill part of the HSG test to Tricare and see if they would pay it and she would pay the other things that she knew Tricare wouldn't cover. Well it worked and she didn't have to pay all that much. I'm calling Tricare and see what they tell me but I wanted to see if anyone on here has had it covered or not.