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https://www.readbyqxmd.com/read/29763608/early-prognostic-factors-of-outcomes-in-monochorionic-twin-pregnancy-systematic-review-and-meta-analysis
#1
REVIEW
Fiona L Mackie, Matthew J Hall, R Katie Morris, Mark D Kilby
OBJECTIVE: Assess ability of first trimester pregnancy related factors (ultrasound measurements, maternal characteristics, biomarkers) to predict complications in monochorionic twin pregnancies DATA SOURCES: MEDLINE, EMBASE, ISI Web of Science, CINAHL, the Cochrane Central Registration of Controlled Trials and Research Registers, and Google Scholar, from inception to 12 May 2017. Grey literature and bibliographies of articles were checked. STUDY ELIGIBILITY CRITERIA: Studies that reported ultrasound measurements, maternal characteristics, or potential biomarkers, measured in the first trimester in monochorionic diamniotic twin pregnancies, where the potential prognostic ability between the variable and twin-twin transfusion syndrome, growth restriction, or intrauterine fetal death could be assessed...
May 12, 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29742661/delivery-of-the-nonpresenting-twin-first-rates-and-associated-factors
#2
Eran Weiner, Jon Barrett, Maya Ram, Hayley Lipworth, Yossi Mizrachi, Maayan Bas Lando, Nir Melamed
OBJECTIVE: To estimate the rate of delivery of the nonpresenting twin first and to identify risk factors for such an event by using a cohort of opposite-sex twins for whom the intrauterine order was well documented with ultrasonography before delivery. METHODS: We conducted a retrospective cohort study of all opposite-sex dichorionic twins in a single tertiary center between 2002 and 2016. Reports of ultrasonograms performed less than 2 weeks before birth were reviewed for information on twins' presenting order in relation to fetal sex...
May 7, 2018: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29675904/risk-factors-for-fetal-death-after-radiofrequency-ablation-for-complicated-monochorionic-twin-pregnancies
#3
Luming Sun, Gang Zou, Yingjun Yang, Fenhe Zhou, Duan Tao
OBJECTIVE: Radiofrequency ablation (RFA) is a management alternative for complicated monochorionic twin pregnancies. The purpose of this study is to evaluate risk factors for fetal death after RFA. METHODS: An observational study was performed to document the perinatal outcomes of all cases undergoing fetal reduction using RFA from 2010 to 2016 at the Shanghai First Maternity and Infant Hospital. A multiple regression model was built to identify predictors of the death of the remaining fetus after RFA...
April 19, 2018: Prenatal Diagnosis
https://www.readbyqxmd.com/read/29603257/the-non-human-primate-kidney-transcriptome-in-fetal-development
#4
Kimberly D Spradling-Reeves, Jeremy P Glenn, Kenneth J Lange, Natalia Kuhn, Jacqueline J Coalson, Mark J Nijland, Cun Li, Peter W Nathanielsz, Laura A Cox
BACKGROUND: Little is known about the repertoire of non-human primate kidney genes expressed throughout development. The present work establishes an understanding of the primate renal transcriptome during fetal development in the context of renal maturation. METHODS: The baboon kidney transcriptome was characterized at 60-day gestation (DG), 90 DG, 125 DG, 140 DG, 160 DG and adulthood (6-12 years) using gene arrays and validated by QRT-PCR. Pathway and cluster analyses were used to characterize gene expression in the context of biological pathways...
March 30, 2018: Journal of Medical Primatology
https://www.readbyqxmd.com/read/29595011/-incidental-findings-of-maternal-genetic-abnormalities-during-non-invasive-prenatal-screening
#5
F Léonard, Renaud Gueben, Robin Gueben, B Grisart, C Van Linthout
The non-invasive prenatal test (NIPT) has recently been added in our clinical practice. Sensitivity and specificity of this method in the common fetal aneuploidies screening is about 99 %. This technique remains a screening test, not a diagnosis test, because false positive or negative results exist. The discordant results are explained by the method itself witch analyses the whole free circulating DNA in the maternal blood: the fetal DNA from trophoblastic cells lysing but also the maternal DNA. Placenta confined mosaic is the main false positive cause reported in the literature...
March 2018: Revue Médicale de Liège
https://www.readbyqxmd.com/read/29550862/have-we-done-our-last-amniocentesis-updates-on-cell-free-dna-for-down-syndrome-screening
#6
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/29500316/cognitive-outcome-in-childhood-of-birth-weight-discordant-monochorionic-twins-the-long-term-effects-of-fetal-growth-restriction
#7
Ravi Shankar Swamy, Helen McConachie, Jane Ng, Judith Rankin, Murthy Korada, Stephen Sturgiss, Nicholas D Embleton
AIM: Intrauterine growth restriction (IUGR) is associated with poorer outcomes in later life. We used a monochorionic twin model with IUGR in one twin to determine its impact on growth and neurocognitive outcomes. METHODS: Monochorionic twins with ≥20% birth weight discordance born in the north of England were eligible. Cognitive function was assessed using the British Ability Scales. The Strength and Difficulties Questionnaire was used to identify behavioural problems...
March 2, 2018: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/29492955/an-approximate-joint-model-for-multiple-paired-longitudinal-outcomes-and-time-to-event-data
#8
Angelo F Elmi, Katherine L Grantz, Paul S Albert
Joint modeling of multivariate paired longitudinal data and time-to-event data presents computational challenges that supersede full likelihood estimation due to the large dimensional random effects vector needed to capture correlation due to clustering with respect to pairs, subjects, and outcomes. We propose an alternative, computationally simpler approach to estimation of complex shared parameter models where missing data is imputed based on the Posterior Predictive Distribution from a Conditional Linear Model (CLM) approximation...
February 28, 2018: Biometrics
https://www.readbyqxmd.com/read/29462630/pitfalls-in-assessing-chorioamnionicity-novel-observations-and-literature-review
#9
REVIEW
Jing Lu, Yvonne Kwun Yue Cheng, Yuen Ha Ting, Kwok Ming Law, Tak Yeung Leung
Accurate diagnosis of chorioamnionicity in multiple pregnancies is the key to appropriate clinical management of multiple gestation. Although prenatal ultrasound assessment of chorioamnionicity is well established and highly accurate if performed in early pregnancy, exceptions and artifacts arise from anatomic variations in multiple pregnancies and unusual sonographic features do exist. We have summarized our own experiences and reports from the literature on these pitfalls as follows: (1) discordant fetal sex in monochorionic pregnancies due to sex chromosome abnormalities, genital malformation in 1 fetus, or dizygotic twins forming a monochorionic placenta; (2) separate placental masses in monochorionic pregnancies due to bipartite placenta; (3) false-negative and false-positive λ sign can arise for various reasons, and in partial monochorionic/dichorionic placentas both T and λ sign may co-exist; (4) intrauterine synechia appearing as a thick and echogenic intrauterine septum may lead to erroneous diagnosis of dichorionic twins; and (5) errors in ascertaining amnionicity by the visualization of thin intertwin amniotic membranes and the number of yolk sacs...
February 17, 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29420407/maternal-malignancy-evaluation-after-discordant-cell-free-dna-results
#10
Laura M Carlson, Emily Hardisty, Catherine C Coombs, Neeta L Vora
Cell-free DNA screening for fetal aneuploidy is a commonly used testing strategy in pregnancies at high risk for fetal aneuploidy. The use of cell-free DNA screening is expanding to the low-risk population, because the detection rate for trisomy 21 surpasses that of traditional screening modalities. Although the sensitivity and specificity of cell-free DNA are superior to traditional screening, false-positive results do occur and may indicate an adverse maternal health condition, including maternal mosaicism or, rarely, malignancy...
March 2018: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29388226/predicting-fetoplacental-chromosomal-mosaicism-during-non-invasive-prenatal-testing
#11
Nathalie Brison, Maria Neofytou, Luc Dehaspe, Baran Bayindir, Kris Van Den Bogaert, Leila Dardour, Hilde Peeters, Hilde Van Esch, Griet Van Buggenhout, Annick Vogels, Thomy de Ravel, Eric Legius, Koen Devriendt, Joris R Vermeesch
OBJECTIVE: Non-invasive prenatal detection of aneuploidies can be achieved with high accuracy through sequencing of cell-free maternal plasma DNA in the maternal blood plasma. However, false positive and negative non-invasive prenatal testing (NIPT) results remain. Fetoplacental mosaicism is the main cause for false positive and false negative NIPT. We set out to develop a method to detect placental chromosomal mosaicism via genome-wide circulating cell-free maternal plasma DNA screening...
March 2018: Prenatal Diagnosis
https://www.readbyqxmd.com/read/29363848/consensus-definition-and-essential-reporting-parameters-of-selective-fetal-growth-restriction-in-twin-pregnancy-a-delphi-procedure
#12
Asma Khalil, Irene Beune, Kurt Hecher, Klaske Wynia, Wessel Ganzevoort, Keith Reed, Liesbeth Lewi, Dick Oepkes, Eduardo Gratacos, Basky Thilaganathan, Sanne J Gordijn
OBJECTIVES: Twin pregnancies complicated by selective fetal growth restriction (sFGR) are associated with increased perinatal mortality and morbidity. Inconsistences in the diagnostic criteria for sFGR employed in existing studies hinder the ability to compare or combine their findings. It is therefore challenging to establish robust evidence-based management or monitoring pathways for these pregnancies. The main aim of this study was to determine, by expert consensus using a Delphi procedure, the key diagnostic features of and the essential reporting parameters in sFGR...
January 24, 2018: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29316011/roles-of-venovenous-anastomosis-and-umbilical-cord-insertion-abnormalities-in-birthweight-discordance-in-monochorionic-diamniotic-twin-pregnancies-without-twin-twin-transfusion-syndrome
#13
Hiroko Konno, Takeshi Murakoshi, Akiko Yamashita, Mitsuru Matsushita
AIM: We evaluated risk factors for birthweight discordance in monochorionic diamniotic (MCDA) twin pregnancies without twin-twin transfusion syndrome (TTTS). METHODS: We investigated all MCDA twin placentas injected with colored dye at our institution between 2007 and 2015. We excluded pairs of twins with TTTS, fetal demise, or severe fetal malformation. All pairs of twins were assigned to the discordant group (birthweight discordance ≥ 25%) or the concordant group (birthweight discordance < 25%)...
April 2018: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/29314091/the-relationship-between-preoperative-fetal-head-circumference-and-2-year-cognitive-performance-after-laser-surgery-for-twin-twin-transfusion-syndrome
#14
Andrew H Chon, Mary Rose Mamey, Sheree M Schrager, Douglas L Vanderbilt, Ramen H Chmait
OBJECTIVE: To determine the relationship between preoperative fetal head circumference (HC) and cognitive performance among children treated with laser surgery for twin-twin transfusion syndrome (TTTS). METHODS: Donor and recipient twin HCs were measured preoperatively (16-26 weeks' gestation) and at 2 years corrected age. Multilevel multivariate regression models were used to test pregnancy and child-level risk factors for lower Battelle Developmental Inventory Second Edition (BDI-2) scores...
February 2018: Prenatal Diagnosis
https://www.readbyqxmd.com/read/29301441/use-of-the-foetal-myocardial-performance-index-in-monochorionic-diamniotic-twin-pregnancy-a-prospective-cohort-and-nested-case-control-study
#15
Amanda Henry, Saranya Gopikrishna, Aditi Mahajan, Jennifer Alphonse, Neama Meriki, Alec W Welsh
AIMS: Assess clinical utility of the foetal Myocardial Performance Index (MPI) in evaluation and management of monochorionic, diamniotic twin (MCDA) pregnancies. METHODS: Prospective cohort of (a) initially uncomplicated MCDA (b) Complicated MCDA, including twin-twin transfusion syndrome (TTTS), selective intrauterine growth restriction (sIUGR), and liquor and/or growth discordance (L/GD) not meeting TTTS or sIUGR criteria. TTTS and sIUGR were case-control matched...
January 18, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29297658/current-perspectives-on-the-use-of-fetal-fibronectin-testing-in-preterm-labor-diagnosis-and-management
#16
Michael S Ruma, Katie C Bittner, Clara B Soh
One in 10 infants in the United States is delivered preterm (ie, before the 37th week of pregnancy), contributing to the significant burden on the national healthcare system. Nevertheless, a lack of agreement continues among obstetric professional societies on guidelines for standardization of the approach to the diagnosis and management of patients with symptoms of preterm labor (PTL). This disparity in consensus has likely resulted in poor identification of women at an increased risk for preterm birth (PTB)...
December 2017: American Journal of Managed Care
https://www.readbyqxmd.com/read/29286910/selective-iugr-in-dichorionic-twins-what-can-doppler-assessment-and-growth-discordancy-say-about-neonatal-outcomes
#17
Paola Algeri, Matteo Frigerio, Maria Lamanna, Petya Vitanova Petrova, Sabrina Cozzolino, Maddalena Incerti, Salvatore Andrea Mastrolia, Nadia Roncaglia, Patrizia Vergani
OBJECTIVE: The aim of the present study was to assess, in a population of dichorionic twin pregnancies with selective growth restriction, the effect of inter-twin differences by use of Doppler velocimetry and fetal growth discordancy on perinatal outcomes. METHODS: This was a retrospective study including dichorionic twin pregnancies from January 2008 to December 2015 at the Department of Obstetrics and Gynecology of Fondazione MBBM. Only dichorionic twin pregnancies affected by selective intrauterine growth restriction (IUGR) delivering at ≥24 weeks were included in the study...
December 29, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/29239474/maternal-liver-transplant-another-cause-of-discordant-fetal-sex-determination-using-cell-free-dna
#18
Maria Neofytou, Nathalie Brison, Kris Van den Bogaert, Luc Dehaspe, Koen Devriendt, Anja Geerts, Joris R Vermeesch
Noninvasive prenatal testing (NIPT) can very accurately determine fetal sex during pregnancy. We present an exceptional case where NIPT contradicts the ultrasound-based sex determination. The pregnant woman was recipient of a liver transplant from a male donor. Graft-derived cell-free DNA released into the maternal circulation clouded the NIPT-based sex determination. Hence, NIPT is not advisable when the pregnant mother underwent an organ transplant.
January 2018: Prenatal Diagnosis
https://www.readbyqxmd.com/read/29232060/cover-image-volume-176a-number-1-january-2018
#19
Satoru Ikenoue, Kei Miyakoshi, Tomohiro Ishii, Yu Sato, Toshimitsu Otani, Yohei Akiba, Yoshifumi Kasuga, Daigo Ochiai, Tadashi Matsumoto, Yosuke Ichihashi, Yohei Matsuzaki, Kanako Tachikawa, Toshimi Michigami, Gen Nishimura, Kazushige Ikeda, Tomonobu Hasegawa, Mamoru Tanaka
The cover image, by Satoru Ikenoue et al., is based on the Clinical Report Discordant fetal phenotype of hypophosphatasia in two siblings, DOI: 10.1002/ajmg.a.38531.
January 2018: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29215645/cherchez-la-femme-maternal-incidental-findings-can-explain-discordant-prenatal-cell-free-dna-sequencing-results
#20
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
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