I just wanted to tell you that I took four tests, and the later I took them, the LIGHTER they got!!! I was FREAKED out. I even taped them in a row by date, dated them with a marker and took them to the doctor's office to show my doctor! They laughed and said that it doesn't mean anything, as long as there are two lines of any shade, you are fine. They said they are just cheap over the counter tests that detect if there is any HCG in your urine - they do not detect the amount that's in your urine, so the color shade can't mean anything. I am now almost 12 weeks along and have had two perfect ultra sounds with a great sized baby and very strong heart beat! Hope this info can ease your mind!