Just wanted to let everyone know that I used the FRER and I know you are not supposed to read a negative result after 10 minutes, but on all my early tests a line appeared after the ten minutes and then a few days later I got my BFP! I don't think this test has evaporation lines it just takes longer to detect very low amounts of hcg. I was getting discouraged since it says it can predict up to 6 days early, but my bfp did not show until the day AF was due.