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Is it a false positive if a pregnancy test read negative then the same test read positive twelve hours later?
If you mean the exact same testing paper was used then it could be a false positive. Most tests have a window of time in which they should be read, and reading it before or after this can be misleading.
If you mean the same brand of test was used, then it almost certainly is a positive result. The hCG that the test picks up if a baby is present increases very rapidly each day, so it is possible it didn't pick it up earlier. This would be especially so if your period isn't due yet.
If you are at or past your period's due date, then it would be hard to tell which result is right. You could retest using a reputable brand - the cheaper ones are sometimes unreliable - or see a doctor to get a more reliable result.
What else can I help you with?
Can a positive pregnancy test turn negative?
No , but a negative test can be a false positive .
Could an error in a pregnancy test result in a false positive or false negative outcome"?
Yes, an error in a pregnancy test could lead to a false positive or false negative result.
Negative pregnancy test but urinated on it again and it went positive?
This happened to me when I got pregnant with my third child. The first test was negative and the second positive. From what I understand, a pregnancy test can give a false negative but rarely gives a false positive.
Whats wrong with Expired pregnancy test?
Your results can be a false-negative or a false-positive.
What is false pregnancy symptoms?
Usually a false pregnancy means that you have taken a pregnancy test and it gives you a positive reading when you are not pregnancy (which is very rare) or a negative reading when you really are pregnant.
What is the percentage of women who are pregnant with false negative test results?
If you took a pregnancy test too early, you could have a false negative. There are seldom false positive's though.
Can a kidney infection cause a false positive result in a pregnancy test?
Some infections in the kidney can cause false positive dipstick test results but not false negative.
What if you r taking vitamin's that has the same things in it as prenatal's will it make you test a false positive?
A pregnancy tests detects the hcg in your system. It can read a false negative but not a false positive.
Can a positive home pregnancy test result be incorrect?
If you are not taking hormone supplements then you are pregnant. You can get a false negative, you cannot get a false positives.
Can you have a positive pregnancy test then negative next day?
yes! A false positive,evaporation line or sadly a misscarriage you didnt know about.
Do steroids cause a false positive pregnancy test?
no prednisone is a steriod that does not interfere with pregnancy tests.
Can antihistamines cause false negative pregnancy test?
Promethazine (Phenagren) can cause a false negative.
