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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.
Best Answer: Pregnancy doesnt usually result until 24-48 hours after intercourse. And it takes a little while (different for everyone) for the body to release the substance a pregnancy test looks for. So, you're looking at atleast 48 hours for a pregnancy test to show positive if you are pregnant.