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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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Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male...
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Related Experiment Video

Updated: Nov 3, 2025

Fish Sperm Assessment Using Software and Cooling Devices
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Advances in sperm analysis: techniques, discoveries and applications.

Changsheng Dai1, Zhuoran Zhang1, Guanqiao Shan1

  • 1Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada.

Nature Reviews. Urology
|June 2, 2021
PubMed
Summary

Sperm analysis is crucial for male infertility diagnosis. Emerging technologies enhance sperm quality assessment, improving fertility treatments and understanding sperm physiology.

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Last Updated: Nov 3, 2025

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Area of Science:

  • Reproductive biology and medical diagnostics.

Background:

  • Global fertility decline and deteriorating semen quality impact one in six couples.
  • Sperm analysis is fundamental for diagnosing and treating male factor infertility.

Purpose of the Study:

  • To highlight emerging techniques for improved sperm analysis.
  • To discuss advancements in understanding sperm physiology.
  • To emphasize the need for multidisciplinary collaboration in fertility research.

Main Methods:

  • Digital holography for motility analysis.
  • Super-resolution microscopy for detailed morphology.
  • Next-generation sequencing for genetic assessment.

Main Results:

  • New techniques offer enhanced accuracy and consistency in sperm analysis.
  • Improved sperm selection for assisted reproductive technologies.
  • Deeper insights into sperm behavior and molecular structures.

Conclusions:

  • Advanced sperm analysis techniques are revolutionizing male infertility diagnosis and treatment.
  • Multidisciplinary collaboration is essential for future progress and improved clinical outcomes.