It was about 7 days, when i first did one (i did ALOT!!) it came up really faint after about 8 minutes, most of the tests say not to read the strip after 5/6 minutes. I then just kept doing them everyday until one friday night it came up draker, then DP made me do another the next morning - just to be sure! (LOL, wasting money but really wanted the two lines to be a bfp!)
So mabey if your not like me and CAN wait, i'd do it after 10 - 12 days.