Will the lines on a urine pregnancy stick be light if there is an impending miscarriage?

Not necessarily. The darkness or lightness of the lines on a urine pregnancy test can vary for several reasons, including the sensitivity of the test, the concentration of the pregnancy hormone (hCG) in the urine, and the timing of the test. Impending miscarriage is not typically associated with lighter lines on a urine pregnancy test. If you are concerned about a potential miscarriage, it is important to consult with a healthcare professional.