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Related Experiment Videos

Preimplantation genetic diagnosis.

J Egozcue1, J Santaló, C Giménez

  • 1Unitat de Biologia Cel.lular, Universitat Autònoma de Barcelona, Edifici CS, 08193, Bellaterra, Spain. josep.egozcue@uab.es

Molecular and Cellular Endocrinology
|September 16, 2000
PubMed
Summary

Preimplantation genetic diagnosis (PGD) helps at-risk couples avoid passing on genetic diseases or chromosome abnormalities. This reproductive technology has successfully resulted in hundreds of healthy births with a low error rate.

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Area of Science:

  • Reproductive Medicine
  • Medical Genetics
  • Embryology

Background:

  • Preimplantation genetic diagnosis (PGD) offers a solution for couples at risk of transmitting genetic disorders.
  • It aims to prevent recurrent miscarriages and pregnancy terminations due to genetic abnormalities.
  • Candidate couples include carriers of gene mutations, chromosomal rearrangements, or those with unexplained recurrent abortions.

Purpose of the Study:

  • To describe the techniques and outcomes of preimplantation genetic diagnosis (PGD).
  • To highlight PGD's role in preventing the inheritance of genetic diseases and chromosomal abnormalities.
  • To assess the safety and efficacy of PGD in clinical practice.

Main Methods:

  • Utilizes polymerase chain reaction (PCR) or fluorescent in situ hybridization (FISH) for genetic analysis.

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  • Embryo biopsies are performed at the 6-8 cell stage.
  • Healthy embryos are transferred on day 4 or at the blastocyst stage.

    • Main Results:

    • Several hundred healthy children have been born following PGD procedures.
    • The reported diagnostic error rate is very low, with only one error documented.
    • PGD effectively screens embryos for genetic and chromosomal abnormalities before implantation.

    Conclusions:

    • PGD is a valuable technique for couples at genetic risk, enabling the birth of healthy offspring.
    • The established methods of PGD demonstrate high accuracy and safety.
    • PGD significantly reduces the risk of transmitting genetic diseases and chromosomal abnormalities to offspring.