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There are several things that can contribute to a negative pregnancy test even if you are pregnant. Some medications can give you a false negative, the timing of the test can affect the results. If you did not follow directions properly; if you let the test sit for too long the results may read negative after a while. It is important to read the results within the amount of time given on the instructions of that particular pregnancy test you bought. If you did not perform the test properly (example: you drank a lot of fluids before taking the test, which can dilute your urine). Etc

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Q: What are the reasons for pregnancy tests to show negative?
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Why would a test show negative when 20wks pregnant?

Home pregnancy tests only measure hCG (the pregnancy hormone) up to a certain level. If you hCG levels are higher than what the tests reads then you can end up with a false negative.


What trimester do pregnancy tests start to show up negative?

None, they should stay positive till a few weeks or months after you deliver.


Do pregnancy tests often come out negative in early pregnancy?

I have had two children and both times my tests didn't show I was pregnant until I was atleast 3 weeks pregnant You usually aren't supposed to take a pregnancy test until your first missed period to get the best results.


Can you have negative pregnancy test and period but still be pregnant?

There are always pregnancy tests that can show up negative and you can still be pregnant. The best thing to do is check with your doctor and ask for a pregnancy test. Remember though even the doctor's test can even be wrong. There is not one single pregnancy test that is always 100% correct.


Can a pregnancy test come up positive but your blood test show negative?

Just possibly. Try more tests in a few days and consult a doctor.


Will being diabetic affect the result of a pregnancy test?

Not at all. In a urine test, being diabetic may show the presence of sugar or ketones, whilst pregnancy tests look for the presence of a hormone in the urine. Being diabetic does not therefore affect the result of pregnancy tests.


How long can a pregnancy test show negative when actually pregnant?

Most home pregnancy tests should be accurate from around 2 weeks after ovulation (coinciding with the time your period is due). If it shows negative at this point and you still miss your period, wait another week and retest. Pregnancy tests test for a hormone called HCG which basically doubles every day in early pregnancy, so after around 3 weeks of negative testing, you are probably not pregnant. If in doubt go to the doctor and get a blood test which will prove for definite eitherway.


Can you find out sooner if your pregnant by having a doctor do a pregnancy test?

Maybe. A doctor can do a variety of tests, including urine tests, blood tests, and ultrasound. Sometimes a blood test will show a pregnancy that doesn't yet show up in a urine test.


If you are 2 weeks 4 days pregnant will a pregnancy test show up positive or negative?

A home pregnancy test will show up most probably negative in this case.


If your pregnant will it show up in a drug screen?

No. Pregnancy tests measure the amount of a specific hormone (HCG) that is produced by the embryo once fertilization takes place. Drug tests do not test for this hormone. Also, you CAN get a false negative pregnancy test but almost NEVER a false positive. HCG only exists when there is an embryo maufacturing it.


Can a pregnancy test give a false negative?

Yes a pregnancy test can show negative when you actually are pregnant. The most common false negative happens when there is not enough of the pregnancy hormone HGH to be detected as in early pregnancy. This is why some tests come with another test so that you may retest later. Concentrations of the hormone are higher and easier to detect when you first wake up before you drink anything or go to the bathroom.


Can two different pregnancy tests show a false positive?

It is possible, though rare.