Well, sort of.
The urologist called C back last week, about his test results. "The blood tests came back fine - your testosterone levels are fine, etc. Your semen analysis, however, looks the same as the last one so we know it wasn't a fluke. However, I have no idea why you're having issues."
So the diagnosis is Unexplained Fertility, I guess. The urologist put him on Clomid, but with the caveat that it doesn't have a very good success rate. Besides the Clomid, he doesn't know what to prescribe.
So for three months while the Clomid tries to work, we will see if we can find a reproductive endocrinologist or a urologist with a background in fertility - and someone who is in our network - as this doctor isn't sure what else to do for C.