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Related Experiment Videos

Fetal RhD genotyping from maternal plasma.

Y M Lo1

  • 1Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Kong Hong Special Administration Region. loym@cuhk.edu.hk

Annals of Medicine
|November 26, 1999
PubMed
Summary

Noninvasive prenatal testing can now determine fetal rhesus D (RhD) status using cell-free fetal DNA in maternal blood. This breakthrough offers a safer alternative to invasive procedures for managing RhD-negative pregnancies.

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Area of Science:

  • Genetics
  • Obstetrics
  • Molecular Biology

Background:

  • Prenatal diagnosis of fetal rhesus D (RhD) status is crucial for managing RhD-negative women carrying RhD-positive fetuses.
  • Current diagnostic methods, such as fetal blood sampling and amniocentesis, are invasive and carry risks.

Purpose of the Study:

  • To evaluate the feasibility of noninvasive fetal RhD blood group determination using cell-free fetal DNA (cfDNA) in maternal plasma.
  • To establish a safer alternative to invasive prenatal diagnostic procedures.

Main Methods:

  • Analysis of cell-free fetal DNA (cfDNA) circulating in maternal plasma and serum.
  • Utilizing molecular techniques to detect fetal RHD gene sequences in maternal blood samples.

Main Results:

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  • Three independent research groups successfully demonstrated the noninvasive determination of fetal RhD status.
  • Detection of fetal RhD status from maternal plasma/serum DNA is achievable.

Conclusions:

  • Noninvasive prenatal diagnosis of fetal RhD status is now a reality, marking a significant advancement in prenatal testing.
  • This method provides a safer approach for sensitized pregnancies and serves as a model for other noninvasive prenatal genetic tests.