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Related Experiment Video

Updated: May 2, 2026

Protocol for Human Blastoids Modeling Blastocyst Development and Implantation
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Telomere length in human blastocysts.

Anastasia Mania1, Anna Mantzouratou1, Joy D A Delhanty2

  • 1UCL Centre for PGD, Institute for Women's Health, University College London, 86-96 Chenies Mews, London WC1E 6HX, United Kingdom; Centre for Reproductive and Genetic Health (CRGH), The New Wing Eastman Dental Hospital, 256 Gray's Inn Road, London WC1X 8LD, United Kingdom.

Reproductive Biomedicine Online
|March 4, 2014
PubMed
Summary
This summary is machine-generated.

Shorter telomeres in human embryos are linked to chromosomal abnormalities and advanced maternal age. This finding highlights telomere length as a potential indicator in assisted conception, impacting embryo ploidy and developmental potential.

Keywords:
aneuploidyblastocysthumanpreimplantation embryoquantitative FISHtelomere length

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Area of Science:

  • Reproductive Biology
  • Genetics
  • Cell Biology

Background:

  • Telomeres, protective caps on chromosomes, shorten with cell division.
  • Telomere length is implicated in cellular aging and chromosomal stability.
  • Understanding telomere dynamics in early human development is crucial for reproductive medicine.

Purpose of the Study:

  • To investigate the correlation between telomere length and chromosomal ploidy in human embryos.
  • To assess the relationship between telomere length, embryo developmental rate, and patient age.
  • To explore the role of telomeres in aneuploidy and embryo viability.

Main Methods:

  • Retrospective analysis of donated human embryos (n=35) from an assisted conception unit.
  • Quantitative fluorescent in-situ hybridization (FISH) to measure telomere length in individual cells.
  • Conventional FISH on six chromosomes to determine aneuploidy in the same cells.
  • Analysis incorporated maternal/paternal age, developmental rate, and chromosomal error type.

Main Results:

  • Chromosomally abnormal cells in developmentally slow embryos exhibited shorter telomeres compared to normal cells.
  • Embryos from women of advanced maternal age or with a history of recurrent miscarriage showed significantly shorter telomeres.
  • No significant association was found between telomere length and embryo development rate at 5 days post-fertilization.

Conclusions:

  • Reduced telomere length is associated with aneuploid cells and embryos from older mothers.
  • Telomere shortening may influence embryonic ploidy and cellular division.
  • Telomere length is a potential biomarker for embryo quality and reproductive outcomes in assisted conception.