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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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The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
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Sexual stimulation can take various forms, such as physical touch and visual or auditory cues. When this happens, the parasympathetic reflex in the sacral portion of the spinal cord is activated. This reflex stimulates the release of nitric oxide (NO), which then dilates the arterioles in the penis, increasing blood flow to the erectile tissues - the corpora cavernosa and corpus spongiosum.
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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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Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
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Updated: Apr 12, 2026

Author Spotlight: Advanced Treatment of Seminal Duct Blockage Employing Endoscopy-Mediated Semen Channel Refluviation
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Influence of ejaculation frequency on seminal parameters.

B Jose Manuel Mayorga-Torres1,2, Mauricio Camargo3, Ashok Agarwal4

  • 1Grupo Reproducción, Departamento de Microbiología y Parasitología, Facultad de Medicina, Sede de Investigación Universitaria, Universidad de Antioquia, Calle 70 No. 52-21, Medellín, Colombia. jose.mayorgat@gmail.com.

Reproductive Biology and Endocrinology : RB&E
|May 22, 2015
PubMed
Summary

Daily ejaculation for two weeks did not significantly impact key sperm health metrics. Sperm count and seminal volume decreased, but concentration, motility, and DNA integrity remained stable, suggesting minimal clinical effect.

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Area of Science:

  • Reproductive Endocrinology
  • Andrology
  • Sperm Biology

Background:

  • Sexual abstinence is a clinical criterion influencing sperm quality.
  • The impact of ejaculation frequency on semen parameters requires further investigation.

Purpose of the Study:

  • To assess the effect of daily ejaculation on conventional and functional semen parameters.
  • To evaluate changes in sperm quality with a two-week daily ejaculation regimen.

Main Methods:

  • Semen samples collected daily for two weeks, with analysis every second sample.
  • World Health Organization (WHO) guidelines used for semen analysis.
  • Flow cytometry employed for mitochondrial function, reactive oxygen species (ROS), and DNA fragmentation assessment.

Main Results:

  • Total sperm count and seminal volume decreased during daily ejaculation.
  • Sperm concentration, motility, morphology, and vitality remained unaffected.
  • Functional parameters including plasma membrane integrity, mitochondrial potential, and DNA fragmentation showed no significant changes.
  • Intracellular ROS production exhibited a non-significant decreasing trend.

Conclusions:

  • A two-week period of daily ejaculation has no major clinical impact on conventional semen parameters.
  • Functional sperm parameters remain largely unaffected by a daily ejaculation frequency over two weeks.
  • Average semen parameters stayed above WHO reference values despite daily ejaculation.