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Keywords = cell-fee fetal DNA

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14 pages, 359 KiB  
Case Report
Fetal Aneuploidy Detection by Cell-Free DNA Sequencing for Multiple Pregnancies and Quality Issues with Vanishing Twins
by Sebastian Grömminger, Erbil Yagmur, Sanli Erkan, Sándor Nagy, Ulrike Schöck, Joachim Bonnet, Patricia Smerdka, Mathias Ehrich, Rolf-Dieter Wegner, Wera Hofmann and Markus Stumm
J. Clin. Med. 2014, 3(3), 679-692; https://doi.org/10.3390/jcm3030679 - 25 Jun 2014
Cited by 83 | Viewed by 16007 | Correction
Abstract
Non-invasive prenatal testing (NIPT) by random massively parallel sequencing of maternal plasma DNA for multiple pregnancies is a promising new option for prenatal care since conventional non-invasive screening for fetal trisomies 21, 18 and 13 has limitations and invasive diagnostic methods bear a [...] Read more.
Non-invasive prenatal testing (NIPT) by random massively parallel sequencing of maternal plasma DNA for multiple pregnancies is a promising new option for prenatal care since conventional non-invasive screening for fetal trisomies 21, 18 and 13 has limitations and invasive diagnostic methods bear a higher risk for procedure related fetal losses in the case of multiple gestations compared to singletons. In this study, in a retrospective blinded analysis of stored twin samples, all 16 samples have been determined correctly, with four trisomy 21 positive and 12 trisomy negative samples. In the prospective part of the study, 40 blood samples from women with multiple pregnancies have been analyzed (two triplets and 38 twins), with two correctly identified trisomy 21 cases, confirmed by karyotyping. The remaining 38 samples, including the two triplet pregnancies, had trisomy negative results. However, NIPT is also prone to quality issues in case of multiple gestations: the minimum total amount of cell-free fetal DNA must be higher to reach a comparable sensitivity and vanishing twins may cause results that do not represent the genetics of the living sibling, as described in two case reports. Full article
(This article belongs to the Special Issue Prenatal Genetic Screening and Diagnosis-Part 2)
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