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Related Concept Videos

Sperm Structure and Semen Composition01:22

Sperm Structure and Semen Composition

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During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...
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Fish Sperm Assessment Using Software and Cooling Devices
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New Approaches to Boar Semen Evaluation, Processing and Improvement.

P Sutovsky1

  • 1Division of Animal Science, Departments of Obstetrics, Gynecology and Women's Health, University of Missouri, Columbia, MO, USA.

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Summary

Improving boar fertility in the US involves advanced andrology. New technologies enable precise sperm evaluation and fertility prediction, enhancing swine herd reproductive management.

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Area of Science:

  • Animal Science
  • Reproductive Biology
  • Biotechnology

Background:

  • Boar reproductive performance is crucial for swine herd management in the United States.
  • Advancements in andrology and a deeper understanding of sperm function are key to improving fertility.
  • Current methods for evaluating semen and predicting fertility in boars have limitations.

Purpose of the Study:

  • To explore advanced technologies for objective single ejaculate evaluation and individual boar fertility prediction.
  • To identify novel biomarkers and analytical methods for assessing sperm quality and function.
  • To investigate strategies for managing reactive oxygen species (ROS) and enhancing sperm viability.

Main Methods:

  • Automated flow cytometric semen analysis using vital stains for acrosomal integrity and mitochondrial potential.
  • DNA fragmentation analysis and quantification of specific biomarkers (ubiquitin, PAWP, ALOX15, aggresome).
  • Measurement of sperm-produced reactive oxygen species (ROS) and application of ROS-scavenging antioxidants.
  • Utilizing alternative energy substrates and stimulants like inorganic pyrophosphate and caffeine.
  • Image-based flow cytometry for sperm phenotype analysis integrated with swine genomics.
  • Semen purification techniques including nanoparticle-based purification and magnetic-activated sperm sorting.

Main Results:

  • Automated flow cytometry with vital stains and specific biomarkers can objectively assess sperm phenotypes.
  • Measurement of ROS levels provides an indicator of semen quality, manageable with antioxidants.
  • Energy substrates and stimulants can extend sperm lifespan in extended semen and within the female reproductive tract.
  • Sperm phenotype analysis can be linked to fertility-influencing gene polymorphisms through advancements in swine genomics.
  • Semen purification methods show potential for rescuing poor-quality ejaculates and improving acceptable ones.

Conclusions:

  • Advanced andrology techniques, including flow cytometry and biomarker analysis, offer new possibilities for boar fertility prediction and reproductive management.
  • Strategies for managing ROS, enhancing sperm viability, and purifying semen can significantly improve reproductive outcomes in swine.
  • Integration of these technologies with swine genomics holds promise for a comprehensive understanding of fertility.
  • Successful adoption hinges on addressing challenges related to technology implementation, dissemination, and cost reduction in the swine industry.