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Related Experiment Videos

Sperm function tests and fertility.

R J Aitken1

  • 1ARC Centre of Excellence in Biotechnology and Development, Discipline of Biological Sciences, and Hunter Medical Research Institute, University of Newcastle, Callaghan, NSW, Australia. jaitken@mail.newcastle.edu.au

International Journal of Andrology
|February 10, 2006
PubMed
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Male fertility diagnosis is shifting from sperm count to functional competence. New tests assess sperm function, oxidative stress, and DNA integrity for better prediction of conception and embryonic development.

Area of Science:

  • Reproductive biology
  • Andrology
  • Infertility research

Background:

  • Traditional male infertility diagnosis relies on semen analysis (sperm count, motility, morphology).
  • This approach assumes a threshold of normal sperm guarantees fertility, a concept now considered flawed.
  • Sperm functional competence, not just numbers, is crucial for successful conception.

Purpose of the Study:

  • To highlight the limitations of traditional semen analysis for male infertility diagnosis.
  • To introduce advanced in vitro assays evaluating sperm functional competence.
  • To discuss novel assessments of oxidative stress and DNA integrity in spermatozoa.

Main Methods:

  • Review of traditional semen analysis parameters.
  • Description of various in vitro sperm function assays (e.g., motility, cervical mucus penetration, capacitation, acrosome reaction, fusion).

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  • Introduction of newer tests for oxidative stress and sperm DNA/mitochondrial DNA integrity.

    • Main Results:

    • Functional assays demonstrate higher accuracy in predicting human sperm fertilizing capacity in vitro and in vivo.
    • Oxidative stress and DNA integrity assessments provide insights beyond basic fertilizing potential.
    • These advanced assessments correlate with the ability to support normal embryonic development.

    Conclusions:

    • Sperm functional competence is a more reliable indicator of male fertility than traditional semen parameters.
    • In vitro functional assays and molecular assessments offer improved diagnostic and prognostic value.
    • Evaluating oxidative stress and DNA integrity is vital for predicting both conception and successful embryonic development.