Killer cells

Anyone had their uterus killer cells measured? My friend had 4 <a href="">ivf</a> cycles which all failed, she then paid extra for the killer cell count and it's turns out they were high, she was given treatment and the 5th <a href="">ivf</a> cycle worked. I have unexplained fertility, had three rounds of 50mg clomid and no luck, just wondering if I should pay privately for this test? Any ideas?