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A home pregnancy test detects the hormone human chorionic gonadotropin (hCG) in urine. This hormone is produced by the placenta after implantation of a fertilized egg, typically 6 to 12 days after fertilization. Home tests are qualitative, indicating the presence or absence of hCG through a color change or symbol on a chemical strip. While convenient for early detection, usually within days of a missed period, a positive result should always be confirmed by a healthcare provider through laboratory tests and a pelvic examination. Laboratory tests, which can be quantitative and more sensitive, offer greater accuracy.12

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