I see the reason for the teaking but it also cause discouragement because what if in a teak it's looks positive but at the Dr says that they saw nothing. That's been my fear with tweaking because at the Dr there not going to play with the lights or look hard at a pregnancy test in there office there going to probably look once and see nothing to there eyes and throw the test out and tell you from there professional view what they saw was nothing negative. I see allot of women on here ask for tweak and then later find out they are not pregnant and feel completely heart broken. I mean there some test that you don't even have to tweak because it's clear it's prositve. So why tweak.