PubMed Journals Articles About "Detection Risk Fetal Trisomy Blood Tests Free Fetal" RSS

13:12 EST 9th December 2019 | BioPortfolio

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Showing "detection risk fetal trisomy blood tests free fetal" PubMed Articles 1–25 of 40,000+

A proof-of-concept study on the effects of low total cfDNA content and solutions to increase the NIPT trisomy 21 detection rate.

Non-invasive prenatal testing (NIPT) is routinely used in clinical practice for fetal trisomy screening, but low total cfDNA content and low fetal fraction (LFF) are two factors that affect the detection rate. Samples with low total cfDNA or LFF usually end up with "no-call" results, followed by the blood redraw and re-testing, which is inconvenient for pregnant women and clinicians.

Cell-Free Fetal DNA in the Early and Late First Trimester.

The aim of this work was to investigate the association between maternal and fetal characteristics and the fetal fraction at 8-14 weeks' gestation, with emphasis on the change in the fetal fraction upon repeat sampling.

Fetal Physiologically Based Pharmacokinetic Models: Systems Information on Fetal Blood Components and Binding Proteins.

Fetal blood and plasma volume and binding components are critical parameters in a fetal physiologically based pharmacokinetic model. To date, a comprehensive review of their changes during fetal development has not been reported.

Cost-effectiveness of prenatal screening and diagnostic strategies for Down syndrome: A microsimulation modeling analysis.

Down syndrome (DS) is the most frequently occurring fetal chromosomal abnormality and different prenatal screening strategies are used for determining risk of DS worldwide. New non-invasive prenatal testing (NIPT), which uses cell-free fetal DNA in maternal blood can provide benefits due to its higher sensitivity and specificity in comparison to conventional screening tests. This study aimed to assess the cost-effectiveness of using population-level NIPT in fetal aneuploidy screening for DS.

Blood-based biomarkers in the maternal circulation associated with fetal growth restriction.

Fetal growth restriction (FGR) is associated with 3-4 fold increased risk of stillbirth. Identifying FGR, through its commonly-used surrogate - the small-for-gestational-age (SGA, estimated fetal weight and/or abdominal circumference

The influence of fetal gender and maternal characteristics on fetal cell-free DNA in maternal plasma.

To examine the possible effects of fetal gender and maternal characteristics on concentration of fetal cell-free DNA (cfDNA).

The Utility of MRI for Measuring Hematocrit in Fetal Anemia.

Doppler ultrasound measurements of the peak systolic velocity of the middle cerebral artery can be used to non-invasively diagnose fetal anemia but are less precise following fetal blood transfusion and in late gestation. We have previously demonstrated the feasibility of estimating fetal hematocrit in vitro using MRI relaxation times. Here we report the use of MRI as a non-invasive tool to accurately detect fetal anemia in vivo.

The effect of a maternal meal on fetal liver blood flow.

During the third trimester of development, the human fetus accumulates fat, an important energy reservoir during the early postnatal period. The fetal liver, perfused by the nutrient-rich and well-oxygenated blood coming directly from the placenta, is assumed to play a central role in these processes. Earlier studies have linked fetal liver blood flow with maternal nutritional status and response to the maternal oral glucose tolerance test. Our aim was to explore the effect of a regular maternal meal on fet...

Gene expression analysis of MMPs in women with preeclampsia using cell-free fetal RNA in maternal plasma.

Nucleic acids released from the placenta into the mother's blood circulation system provide a valuable source of potential biomarkers for early detection of pregnancy complications such as preeclampsia (PE). PE affects nearly 5-10% of pregnancies worldwide and is a major contributor to the maternal and neonatal mortality and morbidity. It is known that altered placental expression of matrix metalloproteinases (MMPs) may cause shallow cytotrophoblastic invasion and ultimately lead to preeclampsia. The presen...

Fetal renal blood flow velocimetry and cerebro-placental ratio in patients with isolated oligohydramnios.

It's proposed that oligohydramnios is caused by decreased renal perfusion due to redistribution of fetal blood at fetal growth restriction. Isolated oligohydramnios refers to the presence of oligohydramnios without fetal structural and chromosomal abnormalities, without fetal growth restriction, without intrauterine infection, and in the absence of known maternal disease. It's unknown whether the redistribution or decreased renal perfusion cause isolated oligohydramnios. The aim of the study was to evaluate...

Managing the Unusual Causes of Fetal Anemia.

Rare causes of fetal anemia requiring intrauterine transfusion (IUT) are challenging for fetal medicine specialists.

Free-breathing fetal cardiac MRI with doppler ultrasound gating, compressed sensing, and motion compensation.

Fetal cardiovascular MRI complements ultrasound to assess fetal cardiovascular pathophysiology.

Risk factors associated with fetal pleural effusion in prenatal diagnosis: a retrospective study in a single institute in Southern China.

The aim of this study was to analyse the factors associated with fetal pleural effusion over the past five years in a single institute in the South of China. Between January 2011 and May 2016, 129 foetuses with pleural effusion were referred to the Fetal Medicine Unit in Guangzhou's Women and Children's Medical Center. Seventy-nine women accepted an invasive procedure to rule out chromosomal abnormalities, fetal anaemia, intrauterine infections or some of the submicroscopic chromosomal abnormalities. Our re...

The contingent use of cell-free fetal DNA for prenatal screening of trisomies 21, 18, 13 in pregnant women within a national health service: A budget impact analysis.

Non-invasive prenatal testing (NIPT) based on cell-free fetal DNA (cffDNA) is highly accurate in the detection of common fetal autosomal trisomies. Aim of this project was to investigate short-term costs and clinical outcomes of the contingent use of cffDNA for prenatal screening of trisomies 21, 18, 13 within a national health service (NHS).

A nationwide survey of fetal myelomeningocele in Japan: Backgrounds for fetal surgery.

Fetal surgery for myelomeningocele (MMC) has yet not been performed in Japan, and the clinical backgrounds of fetal MMC in Japan remain poorly described. We examined the prenatal characteristics and perinatal outcomes of fetal MMC to prepare for the introduction of fetal surgery.

A new era in aneuploidy screening: cfDNA testing in >30,000 multifetal gestations: Experience at one clinical laboratory.

Since introducing cell-free DNA screening, Sequenom Laboratories has analyzed over 1 million clinical samples. More than 30,000 of these samples were from multifetal gestations (including twins, triplets and higher-order multiples). The clinical laboratory experience with the first 30,000 multifetal samples will be discussed. Maternal plasma samples from multifetal gestations were subjected to DNA extraction and library preparation followed by massively parallel sequencing. Sequencing data were analyzed to ...

The Effect of In Vitro Hemolysis on Measurement of Cell-Free DNA.

Hemolysis during blood drawing is a common cause of laboratory artifacts. Although circulating cell-free tumor DNA and fetal DNA are currently measured in routine practice, the effect of in vitro hemolysis on the measurement of cell-free DNA (cfDNA) has not been investigated. When in vitro hemolysis occurs, cellular DNA could be released from damaged white blood cells and reduce the fraction of circulating tumor DNA and fetal DNA.

Distribution of Phosphatidylethanol in Maternal and Fetal Compartments after Chronic Gestational Binge Alcohol Exposure.

Phosphatidylethanol (PEth) is a promising biomarker for gestational alcohol exposure. Studies show PEth accumulation in maternal and fetal blood following alcohol exposure, however, distribution of specific PEth homologues (16:0/18:1, 16:0/18:2, 16:0/20:4) in maternal and fetal blood is unknown. Additionally, PEth levels in highly vulnerable FASD targets in maternal and fetal compartments remain unexplored. We hypothesized that all three major PEth homologues will be detectable in the maternal and fetal blo...

Antenatal Fetal Adrenal Measurements at 22 to 30 Weeks' Gestation, Fetal Growth Restriction, and Perinatal Morbidity.

 Our objective was to test the association of fetal adrenal size with perinatal morbidity among fetuses with fetal growth restriction (FGR; estimated fetal weight [EFW] 

What's wrong with using the F word? A systematic integrative review of how the fetus is talked about in situations of fetal demise or high risk of fetal loss.

Limited research exists that investigates the language parents and health professionals use when faced with a high-risk likelihood of fetal demise or an instance of fetal loss. This review examines the language used when referring to the 'fetus' in these cases to better understand the meaning different groups might ascribe to the fetus and how their word choice may reflect their strategies for managing in these situations.

Maternal and Cord Blood Folate Concentrations Are Inversely Associated with Fetal DNA Hydroxymethylation, but Not DNA Methylation, in a Cohort of Pregnant Canadian Women.

Aberrancies in fetal DNA methylation programming may modify disease susceptibility of the offspring. Maternal folate status has potential to alter fetal DNA methylation.

Evaluation and Disposition of Fetal Myelomeningocele Repair Candidates: A Large Referral Center Experience.

Fetal myelomeningocele (fMMC) repair yields superior outcomes to postnatal repair and is increasingly offered at select fetal centers.

Retinol-binding protein 4, fetal overgrowth and fetal growth factors.

Retinol-binding protein 4 (RBP-4) is an adipokine involved in regulating insulin sensitivity which would affect fetal growth. It is unclear whether RBP-4 is associated with fetal overgrowth, and unexplored which fetal growth factor(s) may mediate the association.

Nearly half of all severe fetal anomalies can be detected by first-trimester screening in experts' hands.

Objective To evaluate the detection rate of severe fetal anomalies at the first-trimester screening (FTS) and, vice versa, to evaluate the follow-up of pathological results at FTS at the time of mid-trimester screening (MTS) and throughout pregnancy and delivery in a partially selected population of low-risk pregnancies. Methods We conducted a prospective study on the detection of severe fetal anomalies at routine FTS in 9891 pregnant women with 10,294 fetuses between 11 + 0 and 13 + 6 weeks of gest...

The next generation of noninvasive fetal genotyping and the return to single gene conditions.

The discovery of cell-free fetal DNA (Lo et al. Lancet 1997;350:485-487) heralded the possibility of noninvasive fetal genotyping. Initially, targeted molecular biology techniques were applied to single data points of clinical significance: the presence of Y chromosome material was used to determine fetal sex when the mother was a carrier of an X-linked recessive condition; detectable RHD in mothers known to be Rhesus negative assisted in pregnancies at risk of haemolytic disease of the fetus and newborn; ...

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