Just what i said really. I used them when trying for my last one and they were great and the more you buy the more you save... I think 10 tests for 8.99 or 20 tests for £16. Generally tests aren't that cheap, so a good investment and should you get lucky then pass them on... I bought the first one's they sell in the list, they say advanced and mesure as little as 10 (what ever the unit is called) of pregnancy hormone. Hope that helps someone out there. I might have to invest for my next one. Oh and delivery is free.