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Doctor insights on: Can I Receive A False Positive For Down Syndrome From A Blood Test

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Has any one had the blood test positive for Down syndrome but then ultrasound showed the baby fine?

Has any one had the blood test positive for Down syndrome but then ultrasound showed the baby fine?

Accuracy matters: The ultrasound is a screening test, and as such may over or underestimate the presence of what is being looked for. Accuracy is often dependent on the training of the tech and or who reads the study.The blood test is a definitive test, it is either positive or not.I would never rely on the ultrasound for any decision other than pushing me to order the blood test . ...Read more

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Dr. Kathryn Akin
641 doctors shared insights

Down Syndrome (Definition)

Down syndrome is the classic presentation clinically of the congenital malformation syndrome also known as Trisomy 21. Classic features may include simian creases, epicanthal folds, upslanting palpebral fissures, flat nasal bridge, hypertelorism, low set ears, endocardial cushion defects of the heart, atlanto-axial joint instability, blood ...Read more


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Does a positive blood test for Down syndrome mean my baby will be born with it?

Does a positive blood test for Down syndrome mean my baby will be born with it?

Too sensitive a: Question. It is not clear what you mean by blood test. If it is a screening test, then you need to get additional tests, like amniocentesis done for a definitive answer. Please discuss the matter with your doctor and i wish you and your baby the best. ...Read more

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What can you tell me about Down syndrome blood test?

What can you tell me about Down syndrome blood test?

The blood test.: The blood test is testing for 3 copies of chromosome #21 in cells. We normally are only supposed to have 2 copies of chromosome #21 in each cell (1 copy from mother, 1 copy from father). If there are 3 copies found then the Diagnosis of Downs Syndrome (also called Trisomy 21) is made. ...Read more

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How to know if the baby is Down syndrome or mosaic down without blood test?

How to know if the baby is Down syndrome or mosaic down without blood test?

Why do you ask?: You're going to need labs to determine this. Please forgive my frankness. Having a child with possible Down's is an extremely serious business and anyone who would trivialize this by saying, "Let's skip the labs that will establish the diagnosis" is doing both the child and the family a grave disservice. ...Read more

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Told that my blood test came back 1 out 8 for down syndrome. Is that highrisk?

Told that my blood test came back 1 out 8 for down syndrome. Is that highrisk?

Yes: There is a new blood test called maternit21 plus that is available that will spare a great deal of expectant mothers the possibility of miscarriage at amniocentesis. This is done by doing a blood test on the mother to assess for circulating fetal dna using molecular techniques. It is not yet fda approved. http://www.sequenomcmm.com/home/. ...Read more

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My doctor called me and told that my blood test came back postive 1 out 8 for down syndrome. Should I abort?

My doctor called me and told that my blood test came back postive 1 out 8 for down syndrome. Should I abort?

Additonal tests: There are additional, more definitive tests, e.g., amniocentesis, ultrasound examination, that should be done before you make a decision. The topic is not suitable for consultation in this forum. Please consult your doctor. ...Read more

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What is the maternity 21 blood test? How sensitive and specific is it? Does it have false positive rate?

What is the maternity 21 blood test? How sensitive and specific is it? Does it have false positive rate?

False positive: Prenatal testing for chromosomal abnormalities can help determine whether your baby has certain genetic conditions. Knowing more about the health of your baby can help you, your family and your health care provider make informed decisions about your pregnancy. For a more detailed clarification i would suggest a consultation with your ob/gyn to get more information. ...Read more

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If I got a false positive blood test from a dr, could it be too soon for the test to pick it up?

If I got a false positive blood test from a dr, could it be too soon for the test to pick it up?

Unclear question: Test for what? How do you it was false positive? A negative result on a test done too soon is not reliable. You may wish to restate your question. ...Read more