This is known as the "hook effect." It's also possible that you are pregnant, and your second test was a false negative. If ...

But there are cases when a home pregnancy test can produce a false negative result. In other words, the pregnancy test shows that you're not pregnant when you really are. While most false ...

Checking the results too soon or using an expired test could also show a false negative. Home pregnancy tests are usually accurate, but researchers estimate that up to 5% of tests give a false ...

an at-home pregnancy test can measure hCG levels with 97 to 99 percent accuracy. Pregnancy tests with blue or pink dye typically show one line if the result is negative and two if hCG is detected ...

There are reports of people who have a negative test despite being further on in pregnancy, but this type of test failure usually shows up when repeated with a different pack. I would suggest you ...

Blood tests can also detect pregnancy, but they're less common than urine tests. According to the Cleveland Clinic, a small ...