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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.
For those of you who want to test earlier than a urine test, you can visit your doctor for a blood pregnancy test which can help you determine if you are positive within 3-4 days after implantation or about 6-8 days after fertilization and ovulation.Home pregnancy tests are very accurate â between 95 and 99%.emember to only do a pregnancy test from the first day of your missed period (or 21 days after you last had unprotected sex.). In our modern age, it seems we no longer really have to wonder very long if we are pregnant.