im about 5 weeks pregnant but i was getting very concerned as my squinter bfp where not getting any darker!! i then read about the hook effect and at this stage i was clutching at straws!! so i got two frer i did one without diluted wee and it came up once again a squinter to the point where i thought am i going mad!! i then used half wee and half water mixed and tested again and there it was a bfp darker then my tests have ever been, and iv been testing everyday for a week to see this line get darker, so do any of you have any experiences with the hook effect?? :)