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Doctor insights on: False Positives In Pregnancy Tests

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Are false positive HIV tests rare?

Are false positive HIV tests rare?

HIV testing: This depends upon the test employed. They are generally both sensitive and specific but false positive results do occur. This question can be overcome with further testing, the most specific being PCR for HIV RNA. You should be seen by an expert in the management of HIV disease. ...Read more

Dr. Ana Adelstein
4 doctors shared insights

Pregnancy (Definition)

When your due date arrives, you will be more than ready to have your baby! Most women deliver the baby somewhere between 37 and 42 weeks. According to the American College of Obstetricians and Gynecologists, only 5% of babies arrive on the exact due date. Approximately 7% of babies are not delivered by 42 weeks, and when that happens, it is referred to ...Read more


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Positive HIV screener test at blood donation... Negative IFA and Negative NAT... False positive?

Positive HIV screener test at blood donation... Negative IFA and Negative NAT... False positive?

Yes: The initial screening test for HIV is very sensitive, but not very specific. The back up screening tests are much more specific for HIV. ...Read more

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Are false positive herpes test likely?

Are false positive herpes test likely?

No: A positive antibody means you're infected with herpes. That doesn't mean you're developing outrbreaks, but it does mean that you at least have latent herpes somewhere in your body. A positive culture or pcr for herpes means you have an active lesion. ...Read more

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Are blue line pregnancy tests known to give false positives?

Are blue line pregnancy tests known to give false positives?

See below: The answer is yes. Any test in medicine can have false positive and false negative tests. If your test is positve wait a couple of days and retest two postive tests would make it very unlikely to be wrong. ...Read more

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False positive stress test reason?

False positive stress test reason?

Body habitus: Most common cause of false positive stress test is body habitus. This commonly affects women because the heart rhythm needs to be picked up through their breast tissue. ...Read more

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Can ANA test be false negative for lupus?

Can ANA test be false negative for lupus?

Lupus: Has specific criteria for diagnosis, ANA is just one of them and canot be relied on by itself for a diagnosis. ...Read more

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Can pregnancy tests at dollar tree give you a false positive results?

Can pregnancy tests at dollar tree give you a false positive results?

Very unlikely: A false positive pregnancy test is very unlikely. If you are concerned, ask your doctor for a blood level of hcg: that will tell you for sure. ...Read more

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False positive? Can the Depo-Provera shot produce a false positive on a home pregnancy test?

False positive? Can the Depo-Provera shot produce a false positive on a home pregnancy test?

Depo : Depo should not cause a false positive on a pregnancy test. Since false negatives are much more common than false positives, you should call your doctor right away and have them test you to know for sure. You could be pregnant. Good luck! ...Read more

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Can pcos cause false positive pregnancy test?

Can pcos cause false positive pregnancy test?

PCO: The principal features are anovulation, resulting in irregular menstruation, ovulation-related infertility; excessive amounts or effects of androgenic (masculinizing) hormones, resulting in acne and facial hair, Insulin resistance, often associated with obesity, type 2 diabetes, and high cholesterol levels. It will not give you a positive pregnancy test. ...Read more

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Tetrahydrocanabinol what causes for false negative and false positive?

Tetrahydrocanabinol what causes for false negative and false positive?

Great question: I think dilute urine is the most likely source for false negatives. I am not familiar with other substances outside of the cannabinoid class of compounds (some of the newer synthetics?) that will react with standard immunoassays. If one is concerned, however, about a false positive there is confirmatory testing that can determine for sure whether it was a false positive or not. ...Read more

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Are blue dye pregnancy tests known for giving false positives ?

Are blue dye pregnancy tests known for giving false positives ?

Controversial.: Many patients report problems with how they interpret the blue lines. So if you study how to interpret the blue lines you might get less 'false positives'. Generally speaking pregnancy tests are really good in having very few false positives. If it is an issue, get pink dye ones. ...Read more