Publications by authors named "Giovanni Colpi"

Purpose: This study evaluates the current state of andrology practice worldwide, identifies challenges faced by clinicians, and explores training, certification, and research opportunities. It also seeks to redefine the qualifications necessary to be recognized as an andrologist and to propose areas for standardization and improvement.

Materials And Methods: A global, cross-sectional survey was conducted using a 48-question online questionnaire designed by international experts.

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Purpose: Non-obstructive azoospermia (NOA), defined as the absence of sperm in the ejaculate due to testicular failure, is observed in 5% to 15% of infertile men and accounts for two-thirds of azoospermia cases. The management of NOA is marked by significant controversy and global variation in diagnostic and therapeutic approaches, highlighting the crucial need for well-designed and standardized clinical practice guidelines. We present comprehensive graded clinical practice recommendations and statements for diagnosing and treating NOA, aiming to establish standardized strategies that can globally help guide practitioners in their practice.

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Purpose: Varicocele is among the most common reversible causes of male infertility. Although varicocele is prevalent and there is a growing body of literature on the subject, there are still numerous debates surrounding the matter. This study presents Global Andrology Forum (GAF) clinical guidelines on the management of infertile men with varicocele.

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Background: Previous studies have suggested using testicular sperm for ICSI in patients with oligoasthenoteratozoospermia (OAT) and high, untreatable sperm DNA fragmentation (SDF) with prior ICSI failures using ejaculated sperm, to improve their chances of successful ICSI outcome.

Objectives: To assess whether such patients have signs of partial epididymal obstruction.

Materials And Methods: We retrospectively evaluated 72 infertile men with OAT (sperm count < 10 million/mL, progressive motility < 30%, morphology < 4%) and high (> 30%) SDF who underwent ICSI with testicular sperm following at least two prior ICSI failures with ejaculated sperm; they were divided in two subgroups based on testis histology results indicating either normal or impaired spermatogenesis.

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Purpose: Premature ejaculation (PE) is a commonly encountered male sexual dysfunction (MSD) with various definitions, diagnostic criteria, and treatment options, leading to significant heterogeneity and controversy in its management. This study aimed to explore the global practice patterns of the diagnosis and management of PE.

Materials And Methods: A cross-sectional, global, online survey on PE was conducted using a questionnaire developed by an international cohort of experts.

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Purpose: This study investigated 1) the frequency of quotation errors in multi-authored medical manuscripts in andrology, 2) analyzed common types of quotation errors and the methods used to rectify them, and 3) evaluated their impact on manuscript accuracy, credibility, and research conclusions.

Materials And Methods: Twelve manuscripts written by the Global Andrology Forum (GAF) members between 2023 and 2024 were randomly selected for this study. The manuscripts and "Quotation Verification Sheets" were analyzed by senior GAF researchers to detect the number and types of quotation errors.

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Hormonal factors play an essential role as an underlying causative factor of oligoasthenoteratozoospermia (OAT), and these patients can benefit from hormonal medications that modulate the hypothalamic-pituitary-gonadal axis. This review aims to outline the various medications used as hormonal therapy in treating infertile men with OAT. This manuscript focuses on essential hormonal evaluation, identifying men who would benefit from treatment, selecting the appropriate medication, determining the duration of therapy, and evaluating hormonal treatment outcomes.

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Purpose: In this systematic review and meta-analysis, we investigated assisted reproductive technology (ART) success in infertile men with clinical varicocele and abnormal semen parameters who underwent varicocele repair (VR) before the ART procedure as compared to those who did not.

Materials And Methods: A comprehensive search of the Scopus, PubMed, Embase, and Cochrane Library databases was conducted using a specific query string to identify studies examining the impact of VR on ART outcomes, including fertilization rate, clinical pregnancy, pregnancy loss, and live-birth rate, until October 2023. Outcomes were analyzed based on the type of ART.

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Male infertility has seen an increase in prevalence with cases of azoospermia estimated to affect 10%-15% of infertile men. Confirmation of azoospermia subsequently necessitates an early causal differentiation between obstructive azoospermia (OA) and nonobstructive azoospermia (NOA). Although less common when compared to NOA, OA can represent upward 20%-40% of cases of azoospermia.

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Article Synopsis
  • * A survey created by Global Andrology Forum experts was disseminated online, collecting responses from 479 ED specialists across 62 countries, leading to insights on the most commonly used RT methods.
  • * Results indicate that RT is becoming more popular, especially among middle-aged patients with mild-to-moderate ED, but the lack of robust evidence and guidelines highlights a need for further research in this area.
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Purpose: From a diagnostic standpoint, certain approaches to genetic screening in clinical practice remain ambiguous in the era of assisted reproduction. Even the most current guidelines do not provide definite guidance on testing protocols, leaving clinicians to carefully determine which tests best serve patients struggling with infertility. The lack of uniformity in the current practice of male fertility evaluation can prove to be quite costly, thus necessitating healthcare practitioners to carefully appraise the necessity and weigh the advantages against potential economic and psychological detriments.

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Recent advancements in reproductive medicine have guided novel strategies for addressing male infertility, particularly in cases of non-obstructive azoospermia (NOA). Two prominent invasive interventions, namely testicular sperm extraction (TESE) and microdissection TESE (micro-TESE), have emerged as key techniques to retrieve gametes for assisted reproduction technologies (ART). Both heterogeneity and complexity of NOA pose a multifaceted challenge to clinicians, as the invasiveness of these procedures and their unpredictable success underscore the need for more precise guidance.

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Article Synopsis
  • Non-obstructive azoospermia (NOA) is a prevalent and complex issue with varied treatment options and no definitive guidelines, leading to differing management practices internationally.
  • A comprehensive survey with 336 responses from specialists in 49 countries explored current medical and surgical strategies for NOA, analyzing results against existing guidelines and offering expert recommendations.
  • Key findings included diverse approaches to hormonal therapy, significant variation in sperm retrieval success rates, and differing protocols around varicocele repair and follicle-stimulating hormone cutoff levels for sperm retrieval.
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Article Synopsis
  • * Conducted from July to September 2022, a questionnaire gathered responses from 367 doctors in 49 countries, focusing on how they diagnose NOA through methods like hormone tests and genetic analyses.
  • * The survey identified that while many practices align with guidelines, significant differences in approaches were found, underscoring the need for standardized, evidence-based international guidelines for NOA evaluation.
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Purpose: Varicocele has been associated with high seminal oxidative stress (OS), impaired semen quality, and reduced male fertility potential. However, the exact mechanism(s) underlying the development of varicocele-mediated infertility and the cause-effect relationship between varicocele and testicular dysfunction are not fully understood. The aim of this systematic review and meta-analysis (SRMA) is to investigate the impact of varicocele on testicular OS markers and sperm parameters in experimental animals with varicocele as compared to animals without varicocele.

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The role of partial epididymal obstruction as contributing to the development of oligozoospermia has been neglected for decades. In the early 1970s, however, Robert Schoysman, a gynecological surgeon devoted to the surgical and medical management of male factor infertility, dedicated many efforts to study such a pathology and its possible effects on male fertility. Following the studies of this pioneer in the field, we concentrated our attention to the patterns of partial and complete epididymal obstruction during surgical scrotal exploration, once made possible even in oligozoospermic men by diagnostic and therapeutic interventions, such as vasovesciculography or seminal tract washout test, at present considered obsolete and no longer feasible in light of the current guidelines.

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Article Synopsis
  • The study investigates global practices and challenges in using sperm DNA fragmentation (SDF) assays, which can affect male reproductive potential, as outlined in the latest WHO manual.
  • A survey of 436 reproductive clinicians revealed that the most popular SDF assay is TUNEL, with a significant influence from availability on their choices.
  • Clinicians see the value of SDF testing in understanding infertility but face barriers like insufficient professional guidelines and a lack of accepted reference values for interpreting SDF results.
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Article Synopsis
  • The meta-analysis investigates the effects of varicocele repair on semen parameters in infertile males, combining data from diverse studies without language restrictions.
  • A total of 351 studies were analyzed, revealing significant improvements in several semen parameters post-repair, including semen volume, sperm concentration, total sperm count, motility, and morphology, while sperm vitality showed no improvement.
  • This research is the largest of its kind and highlights the benefits of varicocele repair for male infertility, contributing valuable insights for clinical practice.
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Article Synopsis
  • AI has rapidly advanced in medicine, particularly benefiting fields like andrology and reproductive medicine through technologies like machine learning and neural networks.
  • AI tools can enhance the diagnosis and treatment of male infertility, improve patient care accuracy, and increase efficiency in clinical management and research.
  • Future advancements in AI integration are expected to lead to significant breakthroughs and improvements in evidence-based practices within andrology and reproductive medicine.
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Article Synopsis
  • Epigenetics involves changes in gene activity that don't alter the DNA sequence, impacting sperm development and function during spermatogenesis through various internal and external factors.
  • The paternal epigenome plays a significant role in sperm function, affecting fertilization, embryo development, and offspring health; deviations in epigenetic states are linked to male infertility and associated risks.
  • The review emphasizes the importance of understanding sperm epigenetics for improving fertility diagnosis, treatment options, and outcomes, stressing the need for further research and advancements in high-throughput technologies to explore these mechanisms.
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