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Updated: Aug 9, 2025

Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects
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Optimization of human semen analysis using CASA-Mot technology.

Almudena García-Molina1,2, Nuria Navarro3, Anthony Valverde4

  • 1Department of Reproductive Sciencies, Sperm Analysis Technologies (Spermtech), Buñol, Spain.

Systems Biology in Reproductive Medicine
|February 21, 2023
PubMed
Summary

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For accurate sperm analysis, optimal framerate (FR) is crucial. This study found approximately 150 fps and careful consideration of counting chambers are essential for reliable results in computer-aided sperm analysis (CASA-Mot).

Area of Science:

  • Andrology
  • Reproductive Biology
  • Sperm Motility Analysis

Background:

  • Computer-aided sperm analysis (CASA-Mot) is vital for andrology.
  • Current CASA-Mot systems often use suboptimal framerates (FRs).
  • The choice of counting chambers can impact motility and kinematic assessments.

Purpose of the Study:

  • To determine the optimal framerate (FR) for improving CASA-Mot technology.
  • To evaluate the influence of different counting chambers on sperm motility and kinematics.
  • To enhance the reliability of human sperm kinematic studies.

Main Methods:

  • Sperm images captured at 500 fps, analyzed across FRs (25-250 fps) to find the asymptotic point.
  • Experiments replicated using capillary (disposable) and drop displacement (reusable) counting chambers.
Keywords:
CASA-Mot technologycounting chamberframe ratesemen analysis

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  • Sperm motility and kinematic values assessed under varying experimental conditions.

    • Main Results:

    • The optimal FR (asymptote) was determined to be approximately 150.23 fps, yielding a VCL of 130.58 mm/s.
    • This contrasts with 50 fps, yielding a VCL of 98.89 mm/s.
    • Reusable counting chamber type and depth significantly influenced results; image capture area also affected outcomes.

    Conclusions:

    • Approximately 150 fps is recommended for reliable human sperm kinematic studies using CASA-Mot.
    • The type and depth of counting chambers, along with sampling area, must be considered for accurate analysis.
    • Optimizing FR and accounting for chamber variability enhance the precision of andrological assessments.