Could a negative result be wrong?
More commonly, you can get a negative result from a home pregnancy test when you're actually pregnant. This is known as a false-negative.
You may get a false-negative if you:
* Take the test too early. Wait to take the test until your period is at least one day late.That's the earliest most home pregnancy tests can detect pregnancy. For the most accurate results, take the test one week after a missed period.
* Time the test wrong. If you're collecting urine, do the test within 15 minutes of collecting the sample. And be sure to give the test time to work — but not too much time. You may want to set a timer according to the package instructions.
* Use diluted urine. Drinking too much fluid before taking the test may cause a false-negative result. For the most accurate results, take the test first thing in the morning — when your urine is the most concentrated.
If your period hasn't started within a week after a negative home pregnancy test, repeat the test.