Hi Libs,
I haven't, but it's been mentioned recently in the chartstalkers thread, with a few people having used them - I think Loola and Bagpuss, but can't remember off the top of my head. If you don't get replies here, have a look through the stalkers thread (prob around p.25-30, it would be sometime last week), or post on it.
I've heard of Fertell -
http://www.fertell.co.uk/purchasingfertell/ (that's the one you can get in Boots) but I'm pretty sure at least one person bought theirs from Access Diagnostics -
http://www.accessdiagnostics.co.uk/acat ... Tests.html
That one's £5.99 for 2 tests (female only).
When I told my GP I'd been buying stuff from Access Diagnostics, he nodded and said it was a good site - the surgery buys equipment and tests from there, though he didn't specify which. For £6, might be worth doing?
You can also get Pre-Seed there. Don't know if you've considered/used that, but it gives the sperm a bit of a boost, and extra nourishment. If you only get one shot a month, and you're not already using it, you could try that as it might give you an extra day?
Have you considered charting? If you have progesterone problems, or a luteal phase deficit, then your temps will probably give you a clue. My doctor has already said that he'll start tests at the end of this cycle if I'm not pg by then (6th cycle TTC) because the charts give him a head start as to what to look for - and one of the first tests he will do will be thyroid function as I have very low temps.
Best of luck