Has anyone used this test and does anyone know how to contact them.

I have and just had my girl scanned with no pups!  Not very happy as now due to the low score I feel that I should have re-tested her but was told to take to the stud 3 days after the test.........  It may have been her last chance to have a litter so not pleased right now.

Though have used them before and got pups and been happy.

Yup, used it, and it was spot on. I think this is the no. to try 01937 544000 or www.idexx.co.uk

Is the poster talking about progesterone testing to find out when a bitch ovulates, or testing a males sperm for quality/numbers/motility. 

I assumed by fertility test they mean the latter.

In both cases just  because a bitch ovulated, or the dog has a good sperm count/motility doesn't guarantee a pregnancy resulting in live pups, as there are so many additional factors beyond simple ability to conceive, the fertilised eggs then need to implant, placentas establish etc, all controlled by complex balance of hormones and lack of negative influence like infection. 

At any point from fertilisation to birth a litter or individual whelps can be lost, often long before their presence could ever be confirmed. It's amazing that bitches produce litters so consistently as it is..

I've just used it. I was told to mate my bitch on day 18 and she is now 5 weeks pregnant...would definitely recommend it