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Pre-Implantation Genetic Testing for Aneuploidy on a Semiconductor Based Next-Generation Sequencing Platform
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Noninvasive prenatal testing: the future is now.

Errol R Norwitz1, Brynn Levy2

  • 1Tufts University School of Medicine, Department of Obstetrics & Gynecology, Tufts Medical Center Boston, MA.

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|January 28, 2014
PubMed
Summary
This summary is machine-generated.

Noninvasive prenatal testing (NIPT) using cell-free fetal DNA (cfDNA) offers a safer alternative to invasive procedures for detecting fetal chromosome abnormalities. This advanced screening method analyzes cfDNA in maternal blood, improving accuracy for conditions like trisomy and monosomy.

Keywords:
Cell-free fetal DNANoninvasive prenatal testingPrenatal diagnosisTrisomy 21

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Area of Science:

  • Genetics
  • Obstetrics
  • Molecular Biology

Background:

  • Prenatal diagnosis of chromosome abnormalities has evolved over 40 years, initially relying on invasive methods like amniocentesis and chorionic villus sampling (CVS).
  • While effective, invasive procedures carry risks and are often targeted towards older mothers, despite most aneuploid births occurring in younger populations.
  • Existing noninvasive screening methods (first-trimester risk assessment, quad screening, ultrasound) provide estimates but require confirmatory invasive testing.

Purpose of the Study:

  • To review techniques for analyzing cell-free fetal DNA (cfDNA) in maternal blood for noninvasive prenatal testing (NIPT).
  • To evaluate the evidence supporting cfDNA-based NIPT for detecting chromosomal aneuploidies.
  • To address controversies and discuss future applications of cfDNA analysis in prenatal diagnostics.

Main Methods:

  • Analysis of cell-free fetal DNA (cfDNA) isolated from maternal circulation.
  • Review of numerous reports on cfDNA-based NIPT for chromosomal aneuploidies (trisomy, monosomy).
  • Examination of various techniques used for cfDNA analysis in NIPT.

Main Results:

  • Cell-free fetal DNA (cfDNA) analysis in maternal blood presents a promising noninvasive approach for prenatal detection of chromosome abnormalities.
  • NIPT using cfDNA has demonstrated effectiveness in identifying conditions such as trisomy and monosomy.
  • Commercial NIPT products based on cfDNA analysis are increasingly available.

Conclusions:

  • Noninvasive prenatal testing (NIPT) using cell-free fetal DNA (cfDNA) offers a significant advancement over traditional screening and invasive diagnostic methods.
  • Further research and standardization are needed to address ongoing controversies regarding optimal timing, genetic counseling, and confirmatory testing.
  • The technology holds substantial potential for future applications in prenatal genetic screening.