pgfairy
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Test sensitivity is mostly to do with how little hormone it can detect. However depending on how little it can detect will also determine how dark the line is at any given stage so a 10miu line will be darker than a 15miu line with the same amount of hormone. However the line of how dark it is compared to hormone level is actually a bell shaped curve so a higher sensitivity test will give a weaker line at higher hormone concentrations than a lower sensitivity test!!!! However they ALL depend on how much water you have had to drink.
PP is right. Stop testing. You will make yourself crazy these tests are not exact! They are rough guidelines and only blood tests and US can tell you what's really going on.
PP is right. Stop testing. You will make yourself crazy these tests are not exact! They are rough guidelines and only blood tests and US can tell you what's really going on.