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Related Concept Videos

In Vitro Fertilization01:24

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In vitro fertilization (IVF) is a form of assisted reproductive technology where an egg is fertilized with sperm in a controlled laboratory environment before transferring the resulting embryo into the uterus. This process is designed to help individuals and couples experiencing difficulties conceiving.
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Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when...
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Considering minimal clinically important differences in assisted reproductive technology.

Juan Enrique Schwarze1, Frank Broekmans2, Shiv Gupta3

  • 1Merck Healthcare KGaA, Darmstadt, Germany.

Fertility and Sterility
|June 27, 2025
PubMed
Summary
This summary is machine-generated.

Establishing the minimal clinically important difference (MCID) is crucial for interpreting assisted reproductive technology study results. Defining MCID as a relative measure, reported in advance, enhances consistency and patient-centered interpretation.

Keywords:
Minimal clinically relevant differencesclinical pregnancycumulative live birth ratelive birth rateoocytes retrieved

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Area of Science:

  • Reproductive Medicine
  • Clinical Trial Design
  • Biostatistics

Background:

  • Interpreting study findings requires considering both statistical and clinical significance.
  • The minimal clinically important difference (MCID) is key to identifying patient-beneficial outcomes.
  • Assisted reproductive technology (ART) studies use various benchmarks like pregnancy rates and live births to assess treatment differences.

Purpose of the Study:

  • To evaluate the reporting of minimal clinically important differences (MCIDs) in published literature.
  • To investigate the utility of absolute versus relative differences in defining MCID.
  • To improve consistency in interpreting treatment effects in ART.

Main Methods:

  • Expert opinion was utilized to address the topic.
  • The study involved a critical review of MCID reporting practices.
  • Focus was placed on the application of MCID in assisted reproductive technology.

Main Results:

  • MCID determination for ART is subjective and varies based on absolute or relative difference selection.
  • Inconsistent and overlapping MCIDs lead to differing interpretations of treatment efficacy.
  • A clearly defined, justified MCID threshold, expressed as a relative measure, is recommended for comparative studies.

Conclusions:

  • MCID should be pre-defined and reported as a relative measure for consistent interpretation across diverse patient groups.
  • Absolute measures should also be reported to ensure comprehensive reporting.
  • Standardizing MCID reporting in ART can enhance the clinical relevance of study findings.