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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...
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.
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Menopause01:28

Menopause

Menopause, a natural biological process marking the end of a woman's fertility, typically occurs between the fifth and sixth decade of life. This phase is characterized by the exhaustion of the ovarian follicle pool, leading to less responsive ovaries despite the high levels of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH). The consequential decrease in estrogen production results in symptoms like hot flashes, heavy sweating, headaches, hair loss, muscle pains, vaginal...
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...
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: Jul 9, 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

Which patients with sexual dysfunction are suitable for testosterone replacement therapy?

A Morelli1, G Corona, S Filippi

  • 1Andrology Unit, Department of Clinical Physiopathology, University of Florence, 50139 Florence, Italy.

Journal of Endocrinological Investigation
|December 14, 2007
PubMed
Summary
This summary is machine-generated.

Late onset hypogonadism (LOH), or testosterone deficiency syndrome (TDS), requires symptoms for diagnosis. Testosterone plays a key role in men's sexual function and treating erectile dysfunction (ED).

Related Experiment Videos

Last Updated: Jul 9, 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:

  • Endocrinology
  • Urology
  • Andrology

Background:

  • Hypogonadism, defined as late onset hypogonadism (LOH) or testosterone deficiency syndrome (TDS), is a medical condition requiring symptomatic presentation.
  • Sexual dysfunction (SD) is a prevalent symptom associated with LOH/TDS.

Purpose of the Study:

  • This review examines the role of testosterone (T) in male sexual function, focusing on erectile dysfunction (ED).
  • It covers the epidemiology, pathophysiology, diagnosis, and treatment efficacy of T in ED patients.

Main Methods:

  • Literature review of studies on hypogonadism, testosterone, and erectile dysfunction.
  • Analysis of the prevalence, symptoms, and treatment outcomes in hypogonadal men with ED.

Main Results:

  • Prevalence of hypogonadism in men with ED varies from 1.7% to 35%.
  • Hypogonadism in ED patients is linked to decreased sexual desire and nocturnal erections; its effect on sex-induced erections is less clear.
  • Testosterone influences both the formation and breakdown of cyclic guanosine monophosphate (cGMP), impacting erectile function and PDE5 inhibitor efficacy.

Conclusions:

  • Recognizing hypogonadism is crucial for effectively treating ED.
  • Testosterone substitution can restore responsiveness to PDE5 inhibitors in hypogonadal patients with ED.
  • Diagnostic tools like ANDROTEST may aid in identifying LOH/TDS in patients with SD.