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Infertility in Males

Infertility in Males

Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...

Disorders of the Male Reproductive System

Disorders of the Male Reproductive System

Men's health issues are increasingly recognized as significant, with several conditions posing common threats. Among these, testicular cancer is especially prevalent in younger men, particularly those aged 20 to 35 years. The disease often manifests as a painless mass in the testicles, sometimes accompanied by a sensation of heaviness or a dull ache.
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...

Infertility in Females

Infertility in Females

Female infertility is defined as the inability to conceive after a year of regular, unprotected intercourse and affects about 10–15% of couples worldwide. The primary cause of female infertility is ovulatory disorders, which hinder the release of eggs. These disorders can be classified as hypothalamic amenorrhea, polycystic ovarian syndrome (PCOS), premature ovarian failure, and hyperprolactinemic anovulation disorders.
Endometriosis, a condition characterized by abnormal growth of endometrial...

Spermatogenesis

Spermatogenesis

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 reproductive...

Sexually Transmitted Infections

Sexually Transmitted Infections

Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...

Accessory Ducts of the Male Reproductive System

Accessory Ducts of the Male Reproductive System

The male reproductive system is a complex network of organs and tissues that work together to produce and transport sperm. The epididymis, vasa deferens, ejaculatory ducts, and urethra are the accessory ducts involved in sperm maturation and transportation. These ducts play a critical role in the production and transportation of sperm from the testes to the urethra, where it is then released during ejaculation.
The epididymis is a small, comma-shaped organ located at the back of each testicle.

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Related Experiment Video

Updated: Jun 13, 2026

Mouse Models of Epididymitis Induced by Pathogen-Associated Molecular Patterns

Mouse Models of Epididymitis Induced by Pathogen-Associated Molecular Patterns

Published on: December 12, 2025

[Orchitis and male infertility].

H-C Schuppe¹, A Pilatz, H Hossain

¹Klinik und Poliklinik für Urologie, Kinderurologie und Andrologie, Justus-Liebig-Universität Giessen, Gaffkystrasse 14, 35385, Giessen, Deutschland. Hans-Christian.Schuppe@derma.med.uni-giessen.de

Der Urologe. Ausg. A

|May 8, 2010

Summary

Genital tract infections and inflammations frequently impact male fertility, often causing irreversible damage. Asymptomatic testicular inflammation, though common in infertile men, is underestimated due to a lack of noninvasive diagnostics.

Related Experiment Videos

Last Updated: Jun 13, 2026

Mouse Models of Epididymitis Induced by Pathogen-Associated Molecular Patterns

Mouse Models of Epididymitis Induced by Pathogen-Associated Molecular Patterns

Published on: December 12, 2025

Area of Science:

Reproductive Medicine
Urology
Pathology

Context:

Genital tract infections and inflammations are leading causes of male infertility.
Clinical consequences of symptomatic orchitis and epididymo-orchitis are well-documented.
Asymptomatic or subclinical testicular inflammation has received limited attention.

Purpose:

To highlight the prevalence and impact of asymptomatic testicular inflammation on male fertility.
To underscore the underestimation of chronic asymptomatic testicular inflammation as a cause or cofactor of male fertility disorders.
To identify the need for improved diagnostic and treatment strategies.

Summary:

Systematic histopathological analyses reveal a high prevalence of asymptomatic inflammatory reactions in testicular biopsies from infertile men.
Focal lymphocytic infiltrates in testicular tissue correlate with impaired spermatogenesis and testicular function.
Current noninvasive diagnostic methods are lacking, leading to underestimation of these conditions.

Impact:

Emphasizes the significant, yet often overlooked, role of asymptomatic inflammation in male infertility.
Highlights the need for further research into noninvasive diagnostic tools for testicular inflammation.
Calls for the development of evidence-based treatment recommendations beyond pathogen-specific antibiotics.