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Related Experiment Videos

Interobserver and intraobserver variation in day 3 embryo grading.

Allison E Baxter Bendus1, Jacob F Mayer, Sharon K Shipley

  • 1The Muasher Center for Fertility and IVF, Fairfax, Virginia, USA.

Fertility and Sterility
|November 1, 2006
PubMed
Summary
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Embryo grading shows significant variability between experts, impacting IVF success rates. Standardized systems need validation to ensure consistent embryo quality assessment for better outcomes.

Area of Science:

  • Reproductive Medicine
  • Embryology

Background:

  • In vitro fertilization (IVF) success rates depend on multiple factors, including embryo quality.
  • Standardized embryo grading systems aim to improve communication and consistency in assessing embryo quality.
  • Validation of these grading systems is crucial but often lacking.

Purpose of the Study:

  • To quantify interobserver and intraobserver variability in embryo grading using a standardized system.
  • To assess the impact of factors like education and program size on grading consistency.

Main Methods:

  • A prospective, randomized, blinded study involving 26 embryologists grading 35 day 3 embryo video clips.
  • Utilized the Veeck scale for embryo grading.
  • Calculated Kappa scores and intraclass correlation coefficients to measure variability.

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Main Results:

  • Substantial interobserver variability was observed, with grading differences up to two grades.
  • Moderate intraobserver variability was also found when grading the same embryo.
  • Higher IVF program volume correlated with lower grading variability.

Conclusions:

  • Significant interobserver and moderate intraobserver variability exist in day 3 embryo grading.
  • This variability can affect embryo selection and transfer, potentially impacting IVF program success.
  • Further standardization and validation of grading systems are needed for consistent IVF outcomes.