False negative blood pregnancy testFalse negative blood pregnancy test. get some feedback from moms who have had false negative pregnancy tests . 2 days later they had me come in for another blood test to be sure because the HCG hormone . . The typical pregnancy test checks a woman's blood or urine for the presence . . . The swabs can produce a false negative result. . . . Old Pregnancy . If you take a home pregnancy test too early, you may get a false negative result. . Best Answer: I do preg... more