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Noninvasive prenatal screening

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https://www.readbyqxmd.com/read/29616835/lessons-learned-from-the-implementation-of-non-invasive-fetal-rhd-screening
#1
Frederik Banch Clausen
Introduction In the fight against hemolytic disease of the fetus and newborn, pregnant RhD negative women are offered antenatal and postnatal anti-D immunoglobulin prophylaxis to prevent the development of antibodies against the fetal D antigen. Antenatal prophylaxis has traditionally been provided to all D negative pregnant women, as the fetal RhD type remains unknown until birth. With noninvasive prenatal testing of cell-free DNA, predicting the fetal RhD type has become highly feasible based on analysis of the fetal RHD gene...
April 4, 2018: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/29550971/talking-points-women-s-information-needs-for-informed-decision-making-about-noninvasive-prenatal-testing-for-down-syndrome
#2
Aimée C Dane, Madelyn Peterson, Yvette D Miller
Adequate knowledge is a vital component of informed decision-making; however, we do not know what information women value when making decisions about noninvasive prenatal testing (NIPT). The current study aimed to identify women's information needs for decision-making about NIPT as a first-tier, non-contingent test with out-of-pocket expense and, in turn, inform best practice by specifying the information that should be prioritized when providing pre-test counseling to women in a time-limited scenario or space-limited decision support tool...
March 17, 2018: Journal of Genetic Counseling
https://www.readbyqxmd.com/read/29550862/have-we-done-our-last-amniocentesis-updates-on-cell-free-dna-for-down-syndrome-screening
#3
REVIEW
Kathryn J Gray, Louise E Wilkins-Haug
Prenatal aneuploidy screening changed significantly in 2012 when cell-free fetal deoxyribonucleic acid (DNA) was introduced as a noninvasive prenatal test. A noninvasive prenatal test detects cell free fragments of fetal DNA from the placenta circulating in maternal blood that coexist with cell-free DNA (cfDNA) of maternal origin. Using next-generation sequencing, the noninvasive prenatal test compares maternal and fetal cfDNA ratios for chromosomes of interest (i.e., 21, 18, 13, X, and Y) to assess chromosomal aneuploidy...
April 2018: Pediatric Radiology
https://www.readbyqxmd.com/read/29493577/mosaic-maternal-10qter-deletions-are-associated-with-fra10b-expansions-and-may-cause-false-positive-noninvasive-prenatal-screening-results
#4
Karin Huijsdens-van Amsterdam, Roy Straver, Merel C van Maarle, Alida C Knegt, Diane Van Opstal, Frank Sleutels, Dominique Smeets, Erik A Sistermans
PurposeUsing genome-wide noninvasive prenatal screening (NIPS), we detected a 20-megabase specific deletion starting at 10q25 in eight pregnancies. The deletion could not be confirmed by invasive testing. Since all 10(q25→︀qter) deletions started close to the FRA10B fragile site in 10q25, we investigated whether the pregnant women were indeed carriers of FRA10B.MethodsWe performed NIPS analysis for all autosomes using single-read sequencing. Analysis was done with the WISECONDOR algorithm. Culture of blood lymphocytes with bromodeoxyuridine was used to detect FRA10B expansions...
March 1, 2018: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/29479265/pulse-oximetry-screening-in-newborns-to-enhance-detection-of-critical-congenital-heart-disease
#5
Michael Narvey, Kenny K Wong, Anne Fournier
Pulse oximetry screening is safe, noninvasive, easy to perform and proven to enhance detection of critical congenital heart disease in newborns. However, this test has yet to be adopted as routine practice in Canada. The present practice point highlights essential details and recommendations for screening, which research has shown to be highly specific, with low false-positive rates. Optimal screening for critical congenital heart disease should include prenatal ultrasound, physical examination and pulse oximetry screening...
November 2017: Paediatrics & Child Health
https://www.readbyqxmd.com/read/29458877/1p-deletion-syndrome-a-prenatal-diagnosis-characterized-by-an-abnormal-1st-trimester-combined-screening-test-yet-a-normal-nipt-result
#6
Chung-Yuan Yang, Chuan-Chi Kao, Shuenn-Dyn Chang, Shih-Yin Huang
OBJECTIVE: To present a case with prenatal diagnosis and cytogenetic characterization of 1p36 deletion syndrome whose first trimester combined testing is abnormal but a normal NIPT result. CASE REPORT: A 33-year-old had an abnormal 1st trimester fetal aneuploidy screening result, but no trisomies 13, 18, 21 were detected by the noninvasive prenatal testing. Amniocentesis was performed after ultrasound showed fetal ventriculomegaly and echogenic bowel. The final conventional cytogenetics revealed a karyotype of 46, XX, del(1)(p36)...
February 2018: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29402153/psychological-factors-influencing-choice-of-prenatal-diagnosis-in-chinese-multiparous-women-with-advanced-maternal-age
#7
Bi-Heng Cheng, Jian-Hua Chen, Gao-Hua Wang
OBJECTIVES: To investigate the psychological predictors in Chinese multiparous pregnant women of advanced maternal age (AMA) for choosing aneuploidy screening or diagnostic testing. METHODS: A total of 84 pregnant women of AMA were consecutively enrolled from Renming Hospital, Wuhan University. All participants completed three questionnaires: Zung Self-Rating Anxiety Scale (SAS), Zung Self-Rating Depression Scale (SDS), and Pregnancy Stress Rating Scale (PSRS). Demographic information and the choice of noninvasive prenatal testing (NIPT) versus invasive prenatal diagnosis (PND) were also collected...
February 5, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29396076/-what-are-the-real-purpose-and-scope-of-screening-for-aneuploidy
#8
T Quibel, P Rozenberg
In France, the recommended method for Down syndrome screening is the first trimester combined test, the risk assessment, based on maternal age, ultrasound measurement of fetal nuchal translucency and maternal serum markers (free β-hCG and PAPP-A). The Down syndrome detection rate is 78.7% at a screen positive rate of 5%. However, the best screening test is the integrated test using a combination of first trimester combined test and second trimester quadruple test (serum α-fetoprotein, human chorionic gonadotropin, unconjugated E3 , and dimeric inhibin-A) and being able to achieve a detection rate for Down syndrome of approximately 96% at a screen-positive rate of 5%...
February 2018: Gynecologie, Obstetrique, Fertilite & Senologie
https://www.readbyqxmd.com/read/29380343/prenatal-diagnosis-and-socioeconomic-status-in-the-non-invasive-prenatal-testing-era-a-population-based-study
#9
Lisa Hui, Jenna Barclay, Alice Poulton, Briohny Hutchinson, Jane L Halliday
BACKGROUND: Advances in technology can bring great benefits to human health, but their implementation may be influenced by socioeconomic factors, particularly in the field of prenatal screening for Down syndrome. AIM: To analyse screening test indications for, and diagnostic yield of, invasive prenatal diagnostic testing (PNDx) according to socioeconomic status. METHODS: Retrospective analysis of population-based data on PNDx and karyotype results for 2014-2015 in the Australian state of Victoria...
January 30, 2018: Australian & New Zealand Journal of Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/29377389/modified-methylated-dna-immunoprecipitation-protocol-for-noninvasive-prenatal-diagnosis-of-down-syndrome
#10
Fatemeh Karami, Mohammad R Noori-Daloii, Kobra Omidfar, Mina Tabrizi, Seddigheh Hantooshzadeh, Ashraf Aleyasin, Maryam Daneshpour, Mohammad H Modarressi
AIM: Methylated DNA immunoprecipitation real-time quantitative polymerase chain reaction (MeDIP-real-time qPCR) has been introduced as noninvasive prenatal test that has shown absolute detection rate in the screening of Down syndrome. Herein, we aimed to propose a novel modification of MeDIP-qPCR and assess its potential to alleviate the overall cost of the test, being used in very early weeks of pregnancy, and develop it to a noninvasive prenatal diagnosis biosensor in future researches...
January 26, 2018: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/29362687/false-low-risk-single-nucleotide-polymorphism-based-noninvasive-prenatal-screening-in-pentasomy-49-xxxxy
#11
Manesha Putra, Melissa A Hicks, Jacques S Abramowicz
Introduction  Pentasomy 49,XXXXY is a sex chromosome anomaly difficult to be diagnosed prenatally. We describe a patient of pentasomy 49,XXXXY with false low-risk results using a noninvasive prenatal screening (NIPS). A 30-year-old G1P0 woman presented at 33 6/7 weeks, secondary to sonographic fetal anomalies. She had low-risk NIPS at 13 6/7 weeks. Anatomy survey showed bilateral clubfeet, clinodactyly of the left fifth digit, micropenis, and echogenic bowel. Cytogenetics analysis revealed pentasomy 49,XXXXY syndrome...
January 2018: American Journal of Perinatology Reports
https://www.readbyqxmd.com/read/29300981/chromosome-screening-using-noninvasive-prenatal-testing-beyond-trisomy-21-what-to-screen-for-and-why-it-matters
#12
Kristien Hens
With the new and highly accurate noninvasive prenatal test (NIPT), new options for screening become available. I contend that the current state of the art of NIPT is already in need of a thorough ethical investigation and that there are different points to consider before any chromosomal or subchromosomal condition is added to the screening panel of a publicly funded screening program. Moreover, the application of certain ethical principles makes the inclusion of some conditions unethical in a privately funded scheme, even if such screening would enhance a woman's reproductive autonomy...
January 12, 2018: Journal of Medicine and Philosophy
https://www.readbyqxmd.com/read/29247311/implementing-group-prenatal-counseling-for-expanded-noninvasive-screening-options
#13
Betsy L Gammon, Laura Otto, Myra Wick, Kristy Borowski, Megan Allyse
Recently, practices have begun integrating cell-free DNA-based noninvasive prenatal screening as a screening option for a variety of genetic conditions. According to the National Society of Genetic Counselors, the integration of cfDNA screening into clinical prenatal practice may "significantly shift the paradigm of prenatal testing and screening for all women." The purpose of this study was to determine whether group information sessions can feasibly serve as an alternative to extended one-on-one genetic counseling for the increasing number of women making decisions about prenatal testing and screening...
December 15, 2017: Journal of Genetic Counseling
https://www.readbyqxmd.com/read/29241910/prenatal-diagnosis-of-down-syndrome-a-13-year-retrospective-study
#14
Ana Vičić, Tomislav Hafner, Ivanka Bekavac Vlatković, Petra Korać, Dubravko Habek, Feodora Stipoljev
OBJECTIVE: The aim of this study is to summarize the experience on prenatal diagnosis of Down syndrome. MATERIALS AND METHODS: The study includes a retrospective data analysis of 157 prenatally detected cases of Down syndrome, routinely diagnosed among 6448 prenatal investigations performed during a 13-year period (2002-2014) in a single tertiary center. RESULTS: The prevalence of diagnosed Down syndrome cases was 2.4%. Maternal age alone was indication for prenatal diagnosis in 47 cases (45...
December 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29215645/cherchez-la-femme-maternal-incidental-findings-can-explain-discordant-prenatal-cell-free-dna-sequencing-results
#15
REVIEW
Diana W Bianchi
Circulating DNA fragments in a pregnant woman's plasma derive from three sources: placenta, maternal bone marrow, and fetus. Prenatal sequencing to noninvasively screen for fetal chromosome abnormalities is performed on this mixed sample; results can therefore reflect the maternal as well as the fetoplacental DNA. Although it is recommended that pretest counseling include the possibility of detecting maternal genomic imbalance, this seldom occurs. Maternal abnormalities that can affect a prenatal screening test result include disorders that affect the size and metabolism of DNA, such as B12 deficiency, autoimmune disease, and intrahepatic cholestasis of pregnancy...
December 7, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/29156453/use-of-genetic-testing-after-abnormal-screening-ultrasound-a-descriptive-cohort-study
#16
Alessandra J Ainsworth, Michelle A Holman, Elisabeth Codsi, Myra Wick
BACKGROUND/AIMS: The study aimed to characterize the use of genetic testing after abnormal screening ultrasound. METHODS: We performed a retrospective review of patients undergoing genetic testing after abnormal ultrasound. Genetic evaluation consisted of noninvasive prenatal screening (NIPS) or amniocentesis. Classification of ultrasound findings, type of genetic testing, and results were collected. RESULTS: A total of 139 subjects underwent genetic evaluation after abnormal screening ultrasound...
November 20, 2017: Gynecologic and Obstetric Investigation
https://www.readbyqxmd.com/read/29120459/informative-priors-on-fetal-fraction-increase-power-of-the-noninvasive-prenatal-screen
#17
Hanli Xu, Shaowei Wang, Lin-Lin Ma, Shuai Huang, Lin Liang, Qian Liu, Yang-Yang Liu, Ke-Di Liu, Ze-Min Tan, Hao Ban, Yongtao Guan, Zuhong Lu
PurposeNoninvasive prenatal screening (NIPS) sequences a mixture of the maternal and fetal cell-free DNA. Fetal trisomy can be detected by examining chromosomal dosages estimated from sequencing reads. The traditional method uses the Z-test, which compares a subject against a set of euploid controls, where the information of fetal fraction is not fully utilized. Here we present a Bayesian method that leverages informative priors on the fetal fraction.MethodOur Bayesian method combines the Z-test likelihood and informative priors of the fetal fraction, which are learned from the sex chromosomes, to compute Bayes factors...
November 9, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/29110322/in-silico-size-selection-is-effective-in-reducing-false-positive-nips-cases-of-monosomy-x-that-are-due-to-maternal-mosaic-monosomy-x
#18
Jekaterina Shubina, Dmitry Yu Trofimov, Ilya Yu Barkov, Olga K Stupko, Andrey Yu Goltsov, Irina S Mukosey, Nana K Tetruashvili, Lyudmila V Kim, Vladimir A Bakharev, Natalia A Karetnikova, Taisya O Kochetkova, Regina V Krasheninnikova, Andrey A Bystritskiy, Gennady T Sukhikh
OBJECTIVES: The aim of this study was to establish maternal contribution to false positive noninvasive prenatal DNA screening (NIPS) results and develop the method to distinguish maternal and fetal origin of high-risk monosomy X NIPS calls including mosaic maternal cases. METHOD: A total of 906 women carrying singleton pregnancies have been recruited. Maternal plasma DNA semiconductor massive parallel sequencing was performed to detect common aneuploidies. For the case of high monosomy X risk call, analysis method to distinguish fetal and maternal monosomy X has been additionally applied...
December 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/29097507/noninvasive-prenatal-diagnosis-of-single-gene-disorders-by-use-of-droplet-digital-pcr
#19
Joan Camunas-Soler, Hojae Lee, Louanne Hudgins, Susan R Hintz, Yair J Blumenfeld, Yasser Y El-Sayed, Stephen R Quake
BACKGROUND: Prenatal diagnosis in pregnancies at risk of single-gene disorders is currently performed using invasive methods such as chorionic villus sampling and amniocentesis. This is in contrast with screening for common aneuploidies, for which noninvasive methods with a single maternal blood sample have become standard clinical practice. METHODS: We developed a protocol for noninvasive prenatal diagnosis of inherited single-gene disorders using droplet digital PCR from circulating cell-free DNA (cfDNA) in maternal plasma...
November 2, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/29039166/-detection-of-cell-free-fetal-dna-in-maternal-plasma-for-noninvasive-prenatal-screening-of-fetal-chromosomal-aneuploidies-in-women-of-advanced-maternal-age
#20
Hui Zhu, Zhengyou Miao, Yeqing Qian, Hongge Li, Jinglei Jin, Jing He, Minyue Dong
OBJECTIVE: To evaluate the efficiency of cell-free fetal DNA detection as a non-invasive prenatal screening (NIPS) method for women of advanced maternal age. METHODS: A total of 10 584 women of advanced maternal age who received NIPS were recruited from the Women's Hospital, Zhejiang University School of Medicine and Jiaxing Maternal and Child Health Hospital during February 2015 and September 2016. The pregnancy outcome was followed-up. The sensitivity, specificity, positive and negative predictive value of fetal chromosomal aneuploidy detected in NIPS were analyzed...
May 25, 2017: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
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