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Related Experiment Videos

Trophectoderm biopsy in human blastocysts.

A Dokras1, I L Sargent, C Ross

  • 1Nuffield Department of Obstetrics and Gynaecology, John Radcliffe Hospital, Oxford, UK.

Human Reproduction (Oxford, England)
|October 1, 1990
PubMed
Summary

Trophectoderm biopsy is a feasible technique for human blastocysts, enabling genetic testing. This method allows for controlled cell herniation and biopsy, crucial for preimplantation genetic diagnosis.

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Area of Science:

  • Reproductive Biology
  • Developmental Biology
  • Genetics

Background:

  • Preimplantation genetic diagnosis (PGD) is essential for identifying genetic disorders in embryos.
  • Trophectoderm biopsy offers a potential method for obtaining embryonic cells for PGD.

Purpose of the Study:

  • To evaluate the feasibility and efficacy of trophectoderm biopsy in human blastocysts.
  • To assess the impact of trophectoderm biopsy on subsequent embryo development and hatching.

Main Methods:

  • Micromanipulative techniques were used to create a slit in the zona pellucida of human blastocysts.
  • Controlled trophectoderm cell herniation was induced and cells were biopsied.
  • Embryo development and hatching rates were compared between biopsied and control groups.

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Main Results:

  • Trophectoderm biopsy was successfully performed on 47 human blastocysts.
  • Successful herniation rates were higher in earlier stage blastocysts (day 5-6) compared to later stages (day 7-8).
  • Embryo development and hatching were not significantly impaired by the biopsy procedure.

Conclusions:

  • Trophectoderm biopsy is a viable technique for obtaining extra-embryonic cells from human blastocysts.
  • This method provides sufficient cells for preimplantation genetic diagnosis.
  • The timing of biopsy and slit size are critical factors for successful herniation.