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Why does the line on positive pregnancy tests fade?
I was wondering, why does the line on positive pregnancy tests fade over time?
Great question! The fading of the line on a positive pregnancy test can be due to multiple factors, such as evaporation or improper storage of the test. Additionally, the level of the hormone human chorionic gonadotropin (hCG) in the urine may decrease over time, causing the line to appear fainter or disappear altogether.