![]() Medical News Today has strict sourcing guidelines and draws only from peer-reviewed studies, academic research institutions, and medical journals and associations. Learn more about the factors that can cause a false negative pregnancy test here. If the test is still negative, they should speak with a doctor and request a blood test. If someone believes she is pregnant, but the urine test is negative, they should test her urine again in a few days. The packaging of the at-home urine pregnancy test should indicate the test’s sensitivity. Some brands of pregnancy tests are less reliable than others and their sensitivities may vary from test to test. Medications that affect pregnancy test results include: This means the test shows positive for pregnancy when a woman is not pregnant. using diluted urine for a pregnancy testĬertain medications can also affect the results of a pregnancy test, causing a false-positive result.This means people are pregnant, but the test gave a negative result.įactors that can cause a false-negative result include: Other situations may cause a false-negative result. ![]() If a person follows the directions of an at-home urine pregnancy test correctly, the results are typically reliable. ![]() Why might a pregnancy test give a false negative? For example, if a person only realizes they are pregnant due to the onset of labor, it may not be possible to assess when the pregnancy started. It can be difficult to know how long a cryptic pregnancy lasts. They may also become aware of pregnancy late and avoid seeking medical attention.
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