what is evaporation line on pregnancy test

An evaporation line on a pregnancy test is a faint, typically colorless streak that appears in the results window of the test as the urine dries. It can cause confusion because it may appear where the positive line should be. However, it only appears on tests that show negative results, and it does not indicate pregnancy. The line typically appears if a person waits for longer than the suggested time to read the test result or if the test gets wet. It's important to follow the test instructions and check the results within the recommended time frame to avoid mistaking an evaporation line for a positive test line