Could a negative result be wrong?

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. 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, repeat the test one week after a missed period. If you can't wait that long, ask your health care provider for a blood test.
• Check test results too soon. Give the test time to work. Consider setting a timer according to the package instructions.
• Use diluted urine. For the most accurate results, take the test first thing in the morning — when your urine is the most concentrated.