A faint line on a pregnancy test is an evaporation line. It is colorless or gray, and it appears after the test has dried.. The faint line on a pregnancy test might indicate that the hCG hormone is present in your urine, but the concentration is low because it's early in the pregnancy. The higher the concentration of hCG hormone in your body, the more prominent the positive line on your pregnancy test.
Home pregnancy tests that use colored streaks to indicate positive results may display an evaporation line (evap line). This is a colorless streak that occurs when urine dries on the test strip. Disregard this evap line if it appears; it doesn't mean you're pregnant.. On one Clearblue® Early Digital Pregnancy Test Get my coupon! If you notice a faint line on a pregnancy test, you're likely pregnant - and probably in the very early stages. Find out why your test line may be faint and whether you are pregnant or not.