You squint. You hold it up to the light. You take it to the window, then back to the bathroom. You snap a photo and enhance the brightness. Is that really a line? Or just your desperate hope ...

Add Yahoo as a preferred source to see more of our stories on Google. Home pregnancy test results are only accurate within the first 10 minutes, so read results promptly to avoid misleading lines.

Evaporation lines on pregnancy tests are faint and colorless, appearing when the urine dries. Reading a pregnancy test within the recommended timeframe can prevent misinterpreting evaporation lines as ...