4th iui failed with 2 follicles and 36 million sperm. unexplained infertility or is there a problem? should've worked by now. all hope is gone.

Discouraging: It seems like you have had a rough go of it. I am sorry to hear that. Infertility is often difficult to qualify and/or quantify. You have some options, of course. You guys could always try again. I know that adoption can also be difficult., but love for a child has a funny way of making everything else seem less important. Those kids need love too. You may be surprised at how big your heart is.