Read on to know about the evaporation line on a pregnancy test, why it happens, how to differentiate it from a faint positive line, and methods to prevent it. The control line should appear on every test (an indication that the pregnancy test is valid), but the test line appears only if there are some levels of hCG detected in your urine. Pregnancy is not indicated by evaporation lines on the pregnancy test. Occasionally, a faint line on a pregnancy test means that you are pregnant. Note: For some reason, anecdotally, many mamas find that blue dye tests are more prone to evaporation lines.
An evaporation line is also often thinner than the control line. Taken at this time, home pregnancy tests are up to 99% accurate. Why did I get a faint positive and then a negative? Here are a few scenarios that can lead to evap lines: Indentations: An imperfection that causes an indent line in the test strip can cause urine to pool unevenly on a portion of the strip, leaving a faint line that could be misinterpreted. How Can You Stop Them From Forming? Evaporation lines are usually avoidable if you follow the instructions on the test packaging.
Some newer, digital pregnancy tests use a plus or minus sign, or words like "yes" or "pregnant" to make the results less confusing. Can u get a false positive for letting a pregnancy test sit for 2 hours? False positive]( blue dye evap lines are very much a thing. A woman has missed her period. One way to decrease the chances of the kind of confusion evap lines can cause is to read your results in the time that it states in the instructions. Because let's face it, things can get a little confusing to understand and correctly interpret what the lines on the test actually mean. References: Ernst, H. (2019). I enjoy working to provide excellent service to MyBump2Baby's growing families. A very faint line may also occur if the urine is too diluted to detect hCG. Before the advent of highly sensitive pregnancy tests, women might have had chemical pregnancies without even realising it. An evaporation line may be caused by waiting too long and reading the result after the time limit.
Here are a couple of guidelines to help you determine what you see. What do I do if I see an evap line that looks positive? Keeping your negative pregnancy test out runs the risk of causing an evaporation line, which can look like a faint positive. The evaporation line would be obscured if the test was positive because the color would change in the same spot. What does an evaporation line look like first response? Using a digital pregnancy test will remove the risk of misreading a pregnancy test because of the way the test results announce if you are pregnant or not. Some faint lines on pregnancy tests are the same color as the control line: pink or blue. If you're still concerned about home pregnancy test results, schedule an appointment with your doctor. Can a faint line be an evaporation line? You can email me at [email protected]. Sometimes, however, pregnancy tests can be negative, but still show two lines. If you don't see a clear positive result in the amount of time that the manufacturer states, you should not rely on that test result. As a woman's pregnancy progresses, the level rises.