I have tried the Fertell kit. We bought the "combo" kit and tested both of us. The first time, the male kit did not work. Nothing. No control line... yet we followed the directions EXACTLY! I called the number on the box and they sent us a replacement kit, no questions asked. However, then we had to wait for it to come in the mail and then wait the 2 days to get an accurate result. The second test worked and it said the motile sperm count was fine. I tried the female test and it also came out "fine". However, 7 months later, I have still not gotten my BFP! If you do decide to try it, be sure to keep the box in case your test "fails" like ours did. You will need the number off of the box to get a replacement. Overall, I did feel better when we got the results, but it didn't improve our odds apparently. I guess once I passed 35 yrs, my chances decline by the hour! Good luck!