Its usually thinner than the control line and can be difficult to notice. An evaporation line can also appear if the test gets wet. An evaporation line is usually grey or whitish in color, and will be barely visible. Regardless of the type of urine you use to test your pregnancy, an evaporation line can be a false-positive result. You can do a pregnancy test again a few days after noticing the color change. Its perfectly normal to have some light bleeding, which could be indicative of implantation or spotting. This substance separates from bilirubin in an acid solution and gives urine its characteristic blue-green hue. A half-cup of distilled white vinegar mixed with two tablespoons of your urine will yield a result within a few minutes. An evaporation line is a thin, faint line that can sometimes be seen on a home pregnancy test (HPT) after the urine has dried. If you notice another faint line, you are most likely pregnant. Once it dries, urine may leave a faint line where it evaporated an evap line. Unlike positive result lines, which are usually dark or bright, an evap line will be colorless. The evaporative emissions control system (EVAP) line is a hose that runs from the fuel tank to the engine. However, you should keep in mind that evaporation lines can fool you into thinking youre pregnant. How do you know if it's an EVAP line or positive? The difference between an evaporation line and a faint positive line is that an evaporation line is very thin and colourless. Try not to urinate directly onto the test kit. Evaporation lines are not blue, but they can be confused with blue positive lines on pregnancy tests. Make sure you have read the leaflet inside before starting the first step peeing. Dollar general pregnancy test evap line? Pregnant Discharge Smells Like Vinegar: Is It Normal? The evaporation line is usually colorless and will resemble a faint gray spot on the test. On the other hand, evaporation lines are stains from your evaporated urine. The only exception is an ectopic pregnancy when the embryo attaches outside of the wombs inner lining. 0.93 milli-international units per milliliter (mIU/ml). A pregnant woman might see a pink or blue line on a pregnancy test. The worded results are straightforward and super easy to interpret; you cant get much simpler than results that read pregnant or not pregnant! Another telltale difference between a positive result line and an evaporation result is the time it took for it to appear. If youre concerned about this, consider consulting a healthcare professional. Another common mistake people make when using pregnancy tests is believing that a faint line is a positive result. Some of the most obvious ones are-. Your first urine is the most concentrated with hCG, so if you notice faint lines in your sample, youre probably not pregnant. If the evap line appears on your pregnancy test, repeat the test and take it with you. Although the result of this test may be positive, it does not mean that youre pregnant. In fact, you may not even notice them unless youre really close. Evaporation (Evap) Lines. There is nothing clearer then reading "pregnant" or "not pregnant". Most pregnancy tests will show positive results if the urine has stayed on the test for three to five minutes after the woman takes it. If you had a true evaporation line, future tests will show a negative result.