I want to give anyone who is going through this hope. Sun, X. Huang et al., “A prenatal case with discrepant findings between non-invasive prenatal testing and fetal genetic testings,”, H. Zhang, Y. Gao, F. Jiang et al., “Non-invasive prenatal testing for trisomies 21, 18 and 13: clinical experience from 146, 958 pregnancies,”, Y. Wang, J. Zhu, Y. Chen et al., “Two cases of placental T21 mosaicism: challenging the detection limits of non-invasive prenatal testing,”, M. Smith, K. M. Lewis, A. Holmes, and J. Visootsak, “A case of false negative NIPT for Down syndrome-lessons learned,”, J.-C. Wang, T. Sahoo, S. Schonberg et al., “Discordant noninvasive prenatal testing and cytogenetic results: a study of 109 consecutive cases,”, P. Dar, K. J. Curnow, S. J. The test is suitable from 10 weeks of pregnancy for all single and identical twins pregnancies, including IVF, egg donor or surrogate pregnancies. Some children and adults will need long term support, however many young people attend mainstream schools and live fairly independent lives with varying degrees of assistance. I have also since learned that the tests are not even approved by the US Food and Drug Administration (FDA). The results are summarized in Table 2. The NIPT data obtained using massive parallel sequencing were studied in terms of maternal background, fetal fraction, z-scores, invasive procedure results and neonatal outcomes after birth. My results for the Harmony NIPT came back low risk (1:10,000). It has taken the enjoyment out of my pregnancy, and I wish I had gone straight for the amnio (but nhs restrictions with a low risk combined NT screen didn't allow). how are you feeling? Your nipt is so much more accurate although of course still flawed for false positives as we see here but a false negative is 1 in 10,000 usually (try to find false negative nipt on the boards or the internet and it’s almost impossible). NIPT has high sensitivity and high specificity, but false positive and false negative results still exist. Implications. In such a sensitive situation, I am appalled at how your OBGyn handled the situation and I don’t blame you for being upset. Ultrasound examination at 19 5/7 weeks showed a small male fetus with a right-sided cleft of the lip and alveolar ridge and cerebellar vermis hypoplasia. I agree with you- test always has been commercialised and I think that there has never really been a proper debate about the ethics of it. they just did a redraw and sent it off again. I wanted to jump on here and say that I had a false positive on my SIPS of 1/140 for trisomy 21. function googleTranslateElementInit() { I found the procedure to not be that bad. This could prolong the screening pathway for some women and cause anxiety. That must have been really hard to come to terms with. At the time of getting my blood drawn, the lady who was drawing my blood lightly mentioned to me that oh we are going to be using a new company, we are just giving them a try. Any news? Let the waiting game begin. I luckily tested negative for my NIPT test but I then did the quad test and it came back positive for trisomy 18 I am a complete mess and I don’t have my scan until next week.. praying my baby boy is healthy. Thank you for sharing your journey and adding all the detail. Also, did you have the NHS screening as well as the NIPT or just the NIPT? I missed the genetic counselor’s call snd she had already gone home when I tried calling back. You were right and it wasn’t as bad as I thought it would be. NIPT performed in our department using the SOLiD Wildfire [36] was also consistent with trisomy 18 (-score 25.4). Noninvasive prenatal testing (NIPT) validation studies show high sensitivity and specificity for detection of trisomies 13, 18, and 21. good luck. In Case 2, on average not more than 20–30% nontrisomic cells were present in the cytotrophoblast. My NT was high at my 12 week scan. I cannot tell you not to do so, all I can advise you is to arm yourself with knowledge, pray, have faith and take what you read on forums with a grain of salt. Monday morning I have an appt with another genetic counselor that is required by the perinatal specialist before I am seen. He went ahead to tell me that they have referred me to go a high risk doctor and I should be getting a call from them. The CVS went smooth for the most part and not too terribly painful. I emailed Natera about my results. Although NIPT has been reported to be highly accurate for the detection of the main fetal trisomies (trisomies 21, 18 and 13) , , a small percentage of women have false-positive, false-negative or unreportable results . I spent the first 34 hours of this in a very dark place but I’m trying to remain hopeful. They did not find a single marker. To think boycotting to my DS wedding is too far? They were moving around SO MUCH I was in awe. What made you high risk? In most of these studies, the fetal DNA fraction was not provided for the false negative cases, and follow-up by cytogenetic or molecular genetic investigation of the placenta and the newborn child was not included in the study design. Many docs have already dropped it. Positive predictive value (PPV) – this is the number of truly positive cases that have been identified out of all the cases that have been reported as screen positive/high chance. Noninvasive prenatal testing (NIPT) validation studies show high sensitivity and specificity for detection of trisomies 13, 18, and 21. Everyone is disgusted how my ob office is handling the situation. All the best with your little one. Of the 56,545 women who participated in this study, 54 false-positive (0.095 %) and three false-negative (0.006 %) cases were found. [25], and Mao et al. To comment on this thread you need to create a Mumsnet account. I think the hard thing is that all the consultants and midwives etc... That I've seen, have had the attitude that the NIPT is as good as 100% so when I've mentioned been worried that it might not be, they've just dismissed it as me being over anxious.Can I ask, did you have any additional scans to the 12 weeks and 20 week scans? I think the thing to remember about the NIPT tests is that they are only a screening test not a diagnostic test, there will always be the chance that you could be that “one” in however many hundreds or thousands! Anyone can have a baby with Down’s syndrome, although the chance increases for older mothers, most babies with Down’s syndrome are born to younger women. It is used to screen for Trisomy 21, 18 and 13 as well as sex chromosome … Genetic counselling with regard to false results is important for clients prior to undergoing NIPT. Please can I ask if you don’t mind - were the physical markers for Downs Syndrome subsequently picked up via ultrasound or was it a complete surprise at birth? The St George’s Antenatal Fetal Evaluation (SAFE) test is a NIPT test is a screening test for Down’s, Edwards’ and Patau’s syndromes only, in line with UK National Screening Committee (UKNSC) recommendations. Everything can be so stressful as it is! We describe a false negative case of trisomy 13 and another of trisomy 18 in which NIPT was commercially marketed directly to the clinician. Our OB recommended this top fertility doctor in our area. We were scheduled for a tele-visit with the high risk doctor. Presence of 20–30% euploid cells in the cytotrophoblast would reduce the 10.7% fetal fraction to an effective fetal fraction of 7.5–8.5%. In my city, there are two major hospitals; Mercy or Unity Point. In two biopsies the cytotrophoblast showed 64% and 69% trisomy 18, respectively, whereas mesenchyme was 88% and 80%, respectively. In addition to the benefits offered by NIPT, the people and organisations we spoke to during our project suggested the introduction of NIPT in the NHS screening programme might have a number of consequences that require consideration: Introducing NIPT into the NHS prenatal screening programme may lead to changes in the demand for related NHS services such as genetic counselling, invasive diagnostic testing, termination and laboratory services. I am so sorry to hear and I send you a big hug. I think there have been far more false positives, simply because down syndrome, and other trisomies are pretty rare.
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