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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.
A negative result from a home pregnancy test means you're unlikely to be pregnant. But sometimes it means you've taken the pregnancy test too early to know for sure. Wait until a day or two after your missed period and take another test to be sure. Women sometimes find the results of pregnancy tests hard to read.