Doctor insights on:
False Positives In Pregnancy Tests
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
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
Can pregnancy blood test give false negative. 3 days late, urine test negative and blood test negative too?
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
Yes: Yes is correct! the blood test will turn positive at least several days earlier. ...Read more
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
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
Uncommon: The current tests for chlamydia have an accuracy of over98%. ...Read more
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
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