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Related Concept Videos

Prevalence and Incidence01:08

Prevalence and Incidence

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In statistical epidemiology and health sciences, two essential metrics—prevalence and incidence—are fundamental for understanding disease dynamics within a population. These measures enable public health officials, epidemiologists, and researchers to assess the burden of diseases, allocate resources effectively, and design impactful public health policies and interventions.
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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
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Sperm agglutination: Prevalence and contributory factors.

Garrett K Berger1, Luriel I Smith-Harrison2, Jay I Sandlow1

  • 1Department of Urology, Medical College of Wisconsin, Milwaukee, Wisconsin.

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Summary

Semen agglutination is a common finding in men seeking reproductive care. History of scrotal surgery significantly increases the risk of semen agglutination and variability.

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Area of Science:

  • Reproductive Medicine
  • Andrology
  • Semen Analysis

Background:

  • Semen agglutination is a frequently observed finding in semen analyses, often leading to diagnostic uncertainty.
  • While antisperm antibodies (ASAs) are a suspected cause, other factors like genital tract infections and nutritional deficiencies also contribute.
  • Risk factors for ASAs, such as scrotal trauma or surgery, are known, prompting investigation into their direct link with agglutination.

Purpose of the Study:

  • To determine the prevalence of semen agglutination in a patient population.
  • To correlate agglutination findings with specific risk factors, including scrotal surgery history, irrespective of ASAs.
  • To assess the intrapatient variability of agglutination in men undergoing multiple semen analyses.

Main Methods:

  • A retrospective study analyzed 1,095 semen analyses from a single academic Reproductive Center.
  • Prevalence of agglutination was calculated, categorized by severity (scant, moderate, excessive).
  • Statistical analysis, including chi-squared tests, was used to correlate scrotal surgery history with agglutination and variability.

Main Results:

  • Agglutination was observed in 12.1% of the analyzed semen analyses.
  • Among patients with multiple SAs, 12.2% exhibited variability in agglutination.
  • Patients with a history of scrotal surgery showed a 3.4-fold increased risk of agglutination and a 5.5-fold increased risk of variability.

Conclusions:

  • Semen agglutination is a common occurrence in men presenting for fertility evaluation, with minimal variability within individuals.
  • A history of scrotal surgery is a significant risk factor for both the presence of semen agglutination and its variability.
  • Further research may clarify the multifactorial etiology of semen agglutination and its impact on male fertility.