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Related Concept Videos

Disorders of the Male Reproductive System01:20

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 Males01:23

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...
Testosterone: Functions and Regulation01:26

Testosterone: Functions and Regulation

The intricate hormonal interplay essential for male reproductive health begins with the release of gonadotropin-releasing hormone (GnRH) by the hypothalamus. This hormone prompts the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). LH targets the Leydig cells in the testes, stimulating them to produce and release testosterone. In concert with testosterone, FSH acts on the Sertoli cells within the seminiferous tubules to facilitate the release of...
Spermatogenesis01:41

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...
Male Sexual Response: Erection & Ejaculation01:17

Male Sexual Response: Erection & Ejaculation

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.
The blood filling the erectile tissues compresses the veins, which helps to prevent blood from leaving...
Trichomoniasis01:18

Trichomoniasis

Trichomonas vaginalis is a flagellated protozoan parasite and the causative agent of trichomoniasis, one of the most prevalent non-viral sexually transmitted infections in the United States. This extracellular parasite primarily colonizes the lower genitourinary tract in women—particularly the vagina—and in men, the urethra and prostate. Its structural and functional adaptations enable its survival, motility, and pathogenicity within the host environment.Structural Features and Host EntryT.

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Related Experiment Video

Updated: Jun 16, 2026

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility
04:22

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility

Published on: May 30, 2025

Erectile dysfunction and low testosterone: cause or an effect?

Jack Barkin1

  • 1Humbert River Regional Hospital, University of Toronto, Toronto, Ontario, Canada.

The Canadian Journal of Urology
|February 23, 2010
PubMed
Summary
This summary is machine-generated.

Erectile dysfunction (ED) affects over half of men aged 40-70 and may signal endothelial dysfunction or low testosterone (hypogonadism). Early identification and management are crucial for overall health.

Related Experiment Videos

Last Updated: Jun 16, 2026

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility
04:22

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility

Published on: May 30, 2025

Area of Science:

  • Men's Health
  • Endocrinology
  • Cardiovascular Health

Background:

  • Erectile dysfunction (ED) affects approximately 52% of men aged 40-70.
  • Aging is associated with a natural decline in testosterone levels.
  • ED can be an early indicator of endothelial dysfunction.

Purpose of the Study:

  • To outline the recommended workup, diagnosis, and management strategies for men presenting with ED or hypogonadism.
  • To explore the potential links between ED, hypogonadism, and metabolic syndrome.
  • To emphasize the importance of primary care physician identification of these conditions and comorbidities.

Main Methods:

  • Review of existing studies and clinical guidelines.
  • Discussion of diagnostic criteria for ED and hypogonadism.
  • Exploration of the relationship between ED, low testosterone, and metabolic syndrome.

Main Results:

  • ED is prevalent in middle-aged and older men.
  • Low testosterone levels are common with aging.
  • ED, hypogonadism, and metabolic syndrome appear interconnected.

Conclusions:

  • Primary care physicians should screen for ED and hypogonadism.
  • Comprehensive evaluation including comorbidities like metabolic syndrome is essential.
  • Timely diagnosis and management can improve patient outcomes.