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Related Concept Videos

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...
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...
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...
Sperm Structure and Semen Composition01:22

Sperm Structure and Semen Composition

During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...
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...
Sperm Transport01:15

Sperm Transport

The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
The maturation phase occurs in the epididymis, where sperm...

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Related Experiment Video

Updated: Jul 13, 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

Seminal plasma magnesium and premature ejaculation: a case-control study.

Mohammadreza Nikoobakht1, Mehdi Aloosh, Mohammad Hasani

  • 1Urology Research Center, Sina Hospital, Tehran University of Medical Sciences and Health Services, Tehran, Iran. nikoobakht_m@hotmail.com.

Urology Journal
|July 17, 2007
PubMed
Summary

Genuine premature ejaculation is linked to lower seminal plasma magnesium levels. This study found significantly reduced seminal magnesium in men with premature ejaculation compared to controls.

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The Examination of Peroxidase-Positive Leukocytes in Semen
04:36

The Examination of Peroxidase-Positive Leukocytes in Semen

Published on: January 19, 2024

Area of Science:

  • Reproductive Medicine
  • Clinical Chemistry

Background:

  • Premature ejaculation (PE) is a common male sexual dysfunction.
  • The role of magnesium in male reproductive health is not fully understood.

Purpose of the Study:

  • To investigate the association between genuine premature ejaculation and magnesium levels in serum and seminal plasma.

Main Methods:

  • A case-control study compared 19 patients with genuine premature ejaculation to 19 controls.
  • Serum and seminal plasma magnesium levels were measured using atomic absorption spectrophotometry.
  • Patients with organic or psychogenic causes of PE were excluded.

Main Results:

  • Seminal plasma magnesium was significantly lower in patients with PE (94.73 mg/L) versus controls (116.68 mg/L).
  • No significant difference was observed in serum magnesium levels between the groups.
  • The semen-to-serum magnesium ratio was significantly lower in patients with PE.

Conclusions:

  • Genuine premature ejaculation is associated with decreased seminal plasma magnesium concentrations.
  • Further research is warranted to elucidate magnesium's role in male reproductive physiology and PE.