The FDA has approved Fertell, which is being marketed as the first at-home fertility test for couples. While it may be the answer to some fertility diagnostic issues -- like, for example, just getting the male partner to participate in testing vis a vis providing a semen sample for a lab -- Fertell can only provide a single piece in the jigsaw puzzle that infertility diagnosis becomes for many.
The packaged kit retails for around $100. For that, you get a measurement of the woman's follicle stimulating hormone (FSH) and of the man's sperm concentration (aka sperm count) and motility (movement of the little guys.)
Given that entire books can easily be written about the many things that might render a body infertile, it's relatively easy to conclude that Fertell will provide a smidge of info, albeit usable info, for couples who are wondering about their fertility.
It's by no means a replacement for more detailed diagnosis by a professional.