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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 positive home pregnancy test means that you are pregnant. Home pregnancy tests work by measuring HCG (human chorionic gonadotropic, the pregnancy hormone) in the urine. Unlike blood tests for HCG, which measure the actual amount of hormone, home pregnancy tests just register the presence or absence of HCG. A positive result is quite accurate because the test will not register the presence of HCG unless it is actually there. If your test is positive, you are pregnant. Keep in mind that a home test only measures the presence or absence of HCG. It cannot tell you whether a pregnancy is healthy or whether you have had a miscarriage. You can have a miscarriage and your pregnancy test will remain positive for days or even weeks.