Many believe that a positive result always indicates pregnancy, not accounting for the possibility of false positives due to the factors mentioned. Myth: Evaporation Lines Are Positive Results ...

A false positive pregnancy test result is uncommon ... which sometimes have faint lines, called evaporation lines, that can ...

It can cause a false positive result or a faint line on a ... Important: If a test gets wet or is left out too long, an evaporation line, which is a faint streak may appear on a pregnancy test.