It can cause a false positive result or a faint line on a pregnancy test because the brief pregnancy produces a small amount of hCG in your body. You made a mistake in taking the test.

Even the lightest positive on a test indicates that you have the pregnancy hormone human Chorionic Gonadotropin (hCG) flowing through ... it dries on the testing strip, urine may leave a faint ...

How accurate are pregnancy tests? Getting a reliable reading largely depends on when and how you use the test. It all starts ...