Try testing first thing in the morning (when your urine has a higher concentration of hCG hormone). Fortunately, there are some guidelines for distinguishing between the two. A faint line on a pregnancy test can mean a positive result, an evaporation line, a chemical pregnancy, or a miscarriage. They are usually colorless and typically appear if you wait longer than the recommended time to read your result. What Does an Evaporation Line on a Pregnancy Test Mean? and alllll very clear negatives with no faint line. While there are tests that state they can detect pregnancy 5 or more days before a missed period the success of these tests very much depends on the level of hCG in the urine. Meaning of Faint Line on a Pregnancy Test - Clearblue A faint and thin streak that appears where the positive line on the strip usually should be is called an evaporation line or commonly known as an evap line. Im now 31 weeks and 2 days!!!! Faint Positives, Getting the Most Accurate Pregnancy Test Results. Heres why you might get an evaporation line on a pregnancy test. 2014 Jul;74(7):661-669. doi:10.1055/s-0034-1368589. Using tests which have expired increase your chances of receiving false positive or false negative pregnancy test results. But even a faint positive line has color, and this distinguishes it from an evaporation line, which is colorless. An evaporation line (or evap line) typically appears like a faded streak, while a faint positive test result looks like a lighter blue or pink line, depending on the test dye color. Here's my faint positives from my chemical . Home use tests: pregnancy. ( See our full guide to understanding evaporation lines .) Please whitelist our site to get all the best deals and offers from our partners. I cant tell if its evap line or faint positiveIm driving myself crazy trying to figure it out. An evaporation line on a pregnancy test is a faint line (or rather, mark) caused by a test reaction that occurs when the urine evaporates, or when the test gets wet. Test first thing in the morning because your urine is more likely to have higher levels of hCG at that time. If the control line does not change, this means that the test has not been carried out correctly and will need to be retaken.