You could still have an increased risk for developing breast or ovarian cancer from other factors not covered by the test. While most HBOC—up to 90%—is caused by mutations in the BRCA1 and BRCA2 genes, other genetic predispositions to breast and ovarian cancer include Cowden syndrome, Li-Fraumeni syndrome, Peutz-Jeghers syndrome, and ataxia-telangiectasia. Still others may not yet have been identified by research.

Lola, Utah, USA: Yes, some elevated hCG levels can be due to other factors besides GTD or recurrent trophoblastic disease. Certain hormone fluctuations and proteins in the blood may interfere with blood test results. Both tests should be requested, especially in initial diagnosis of GTD, as well as diagnostic testing for suspected GTD, before any invasive treatment recommendations are pursued. Lola, Utah, USA: GTD is diagnosed and followed by measuring hCG hormone in the blood and urine.

Yes, this happens when the person tested may have an early infection. He or she may not have developed antibody levels high enough that the test can measure. In addition, some people may lack the immune response necessary for the test to work well.

Yes, this is possible. It takes time for your body to create hepatitis C antibodies, so a recent infection may not be detected.

False positive tests are rare - though there are instances and conditions where they can occur. For example, some tissues in a non-pregnant woman can produce hCG, though the levels are usually so low they are not detectable by home pregnancy tests (though our tests are the most sensitive on the market). Secondly, research indicates that half of all "conceptions" (fertilized eggs) do not go forward as a developing pregnancy.

It is very important to realize that because there are a number of risk factors of atrial fibrillation, including both genetic and lifestyle/health factors, receiving a negative result for the deCODE AF? test does not mean that one is at low or no risk of AF. Back to top of page

Should the test be negative it is extremely important that you read and understand the following: There is a period of time (TWENTY-EIGHT DAYS prior to the test) that the AIDS virus is invisible to not only Discreet, but to the ELISA and Western Blot HIV antibody tests as well.

Yes, because it takes some time for your body to produce Hepatitis C antibodies, there is a period of time when recent infections may not be detected.

False negative results are more common than false positives - and are primarily due to inaccuracies in timing of the test or carelessness in the test procedure itself. Please follow test instructions with circumspection and precision. A false negative result can also stem from using a diluted urine sample and/or from taking a test too early in pregnancy. First morning urine contains the most concentrated presence of hCG - which makes it the ideal sample for pregnancy testing.

Yes. Persons with early infection may not as yet have developed antibody levels high enough that the test can measure. In addition, some persons may lack the (immune) response necessary for the test to work well. In these persons, research-based tests such as PCR may be considered.

We strongly recommends that a SAMSHA certified laboratory confirm all non-negative drug test results. Please call us directly for assistance with confirmations.

If your first HIV test is negative, it means you had no detectable HIV antibodies at the time you were tested. However, if you were only recently exposed to the virus, your result may be negative even though you may be infected. A negative result does not mean your partner is negative or that you will not become infected in the future if you are exposed to the virus.

Lack of a test line - a "negative result" - means that, in the sample taken, Stachybotrys chartarum and Aspergillus niger molds are not detectable within the limits of this test. You may have them in lower concentrations, in other locations, or may have other molds present in varying amounts. In any case, you should clean up the suspected area (or have it cleaned up) and be sure to fix any moisture problems. All molds can gradually destroy the things they grow on.

Zopiclone (Zolpidem) is a type of drug that although working in a similar way to traditional benzodiazepines such as Valium, is chemically different to reduce some of the side effects. It is therefore not detected with Intercept® testing. We are unlikely to be able to offer a specific screening test for this in the short term.

Research that Altrix has carried out on the detection of Buprenorphine in Intercept® samples has led us to conclude that an individual who is taking 8mg every 24 hours will usually have a detectable level of Buprenorphine in their sample for up to 24 hours following the last use of the drug. Lower doses of Buprenorphine will mean a shorter period of detection and this will vary widely from person to person – please refer to Altrix Fact File 3 for more information.

A negative test only means that there was no sign of blood detected at that time. It doesn't mean that you don't have cancer. Blood in the stool may occur intermittently or not at all. This test does not substitute for a regular physical and rectal examination by your physician.