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Related Experiment Videos

Assisted hatching of human embryos.

J Cohen1

  • 1Department of Gynecology and Obstetrics, New York Hospital-Cornell University Medical Center, New York.

Journal of in Vitro Fertilization and Embryo Transfer : IVF
|August 1, 1991
PubMed
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Assisted hatching by zona pellucida breaching has risks and benefits. Large holes improve hatching success, especially for embryos with thicker zonae, while narrow openings can be detrimental.

Area of Science:

  • Reproductive biology
  • Embryology
  • Assisted reproductive technology

Background:

  • Zona pellucida breaching in assisted hatching presents both advantages and disadvantages.
  • Narrow zona openings can lead to trophectoderm disintegration and potential monozygotic twinning.
  • Mouse studies highlight the detrimental effects of small zona openings (<5 microns).

Purpose of the Study:

  • To investigate the efficacy and safety of assisted hatching techniques.
  • To determine optimal methods for zona pellucida breaching to improve embryo implantation.
  • To evaluate the impact of zona morphology on assisted hatching outcomes.

Main Methods:

  • Utilizing micromanipulation techniques to create zona openings of varying sizes.
  • Employing acidic Tyrode's solution for assisted hatching in eight-cell embryos.

Related Experiment Videos

  • Comparing implantation rates and embryo development based on zona opening characteristics.

    • Main Results:

    • Large zona openings are effective in promoting embryo hatching, with significant implantation rates observed.
    • Embryos with unthinned zonae (poorer prognosis) show the most benefit from assisted hatching.
    • Embryos with optimal zona morphology do not require micromanipulation and have better outcomes when replaced naturally.

    Conclusions:

    • Assisted hatching, particularly with large zona openings, can enhance implantation success.
    • The benefits of assisted hatching are most pronounced in embryos with compromised zona pellucida.
    • Careful consideration of zona morphology is crucial for selecting appropriate assisted hatching strategies.