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How Long Does a Positive Result Last on a Home Pregnancy Test? Not all home pregnancy tests have the same level of sensitivity to hCG (human chorionic gonadotropin), the pregnancy hormone, so some will show a positive result early in a womanâs pregnancy, and some wonât register positive until up to a week after a missed period.
Most home pregnancy tests will give accurate results if you test at the time your period would normally be due, about two weeks after you ovulate. A test may be negative for several reasons. You may not be pregnant.