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Normal sperm head morphometric reference values in fertile Asian males.

Ye-Lin Jia1, Ying-Bi Wu1, Lin Yu1

  • 1Laboratory of Andrology, West China Second University Hospital Human Sperm Bank, Chengdu 610000, China.

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|December 4, 2023
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Summary

This study establishes new reference values for normal sperm head morphology in fertile Asian males using advanced morphometric analysis. These findings aid in objective male infertility diagnosis and reproductive potential assessment.

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Area of Science:

  • Andrology
  • Reproductive Biology
  • Sperm Morphology Analysis

Background:

  • Sperm head morphology is vital for diagnosing male infertility and assessing reproductive capacity.
  • Current morphological assessment methods lack standardization, comparability, and broad applicability.
  • There is a need for updated, population-specific reference values for sperm morphology.

Purpose of the Study:

  • To determine comprehensive and novel morphometric reference values for normal spermatozoa heads in fertile Asian males.
  • To introduce and validate 14 new morphometric features for detailed sperm head analysis.
  • To provide a basis for objective and standardized sperm morphology evaluation.

Main Methods:

  • Utilized an automated sperm morphology analysis system to capture 23,152 stained spermatozoa from fertile males.
  • Manually annotated 1,856 sperm head images as 'normal' by three experienced technicians.
  • Applied 14 novel morphometric features assessing size, shape, area, and uniformity of sperm heads.

Main Results:

  • Established new morphometric reference values for normal sperm heads in the target population.
  • Quantified sperm head size, shape, area, and acrosome/nuclear uniformity using novel parameters.
  • Demonstrated the clinical applicability and value of detailed morphometric measurements.

Conclusions:

  • The novel morphometric parameters provide valuable data for establishing reference intervals for normal sperm heads in fertile Asian males.
  • This straightforward method enables accurate visual measurements and is clinically applicable.
  • The data supports objective morphology evaluation for male fertilization potential assessment and aids interlaboratory comparisons and training.