In the classic 1980s film, Back to the Future 2, Marty McFly and Dr. Emmet Brown used a car fitted with a time machine to travel 30 years in the future, arriving on Oct. 21, 2015.
The time it takes for a pregnancy test to become negative following a miscarriage depends upon the gestational age at the time of miscarriage. For any pregnancy, whether it ends at term, preterm, or in miscarriage, a urine pregnancy test should be negative after six weeks. If it is not, there are three concerns:or any pregnancy, whether it ends at term, preterm, or in miscarriage, a urine pregnancy test should be negative after six weeks.
It's possible to get a negative result from a home pregnancy test when you're actually pregnant. This is known as a false-negative â and it's much more likely to occur than is a false-positive. You might get a false-negative if you: Take the test too early. The earlier after a missed period that you take a home pregnancy test, the harder it is for the test to detect HCG. For the most accurate results, take the test one week after a missed period â when the level of HCG in your urine is most likely to be detectable.