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Related Concept Videos

Infertility in Males01:23

Infertility in Males

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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...
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Testes: Gross Anatomy01:19

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The testes, also known as testicles, are the male gonads. They are housed within the scrotum, a sac-like structure located beneath the penis. The scrotum's primary role is to regulate the temperature of the testes, which is crucial for sperm production.
Each testis is surrounded by the tunica albuginea, a dense connective tissue layer that provides structural support and protection. This layer is covered by an outer serous membrane called the tunica vaginalis, which helps reduce friction...
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Disorders of the Male Reproductive System01:20

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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....
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Accessory Ducts of the Male Reproductive System01:25

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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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The Y Chromosome Determines Maleness02:19

The Y Chromosome Determines Maleness

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The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....
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Sex-linked Disorders01:43

Sex-linked Disorders

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Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
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Updated: Jul 13, 2025

Murine Orchiectomy and Ovariectomy to Reduce Sex Hormone Production
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Cryptorchidism (Undescended Testicle).

Van Nguyen1, Larry Ngo1, Ecler Ercole Jaqua1

  • 1Loma Linda University Health, Loma Linda, California.

American Family Physician
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PubMed
Summary
This summary is machine-generated.

Cryptorchidism, or undescended testicles, is common in male infants. Early surgery and lifelong monitoring are crucial for preserving fertility and reducing testicular cancer risk.

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Area of Science:

  • Pediatric Urology
  • Genitourinary Malformations

Background:

  • Cryptorchidism is the most common genitourinary malformation in male children.
  • Early identification by primary care physicians is essential.
  • Undescended testicles carry risks of infertility and testicular cancer.

Purpose of the Study:

  • To outline the diagnosis and management of cryptorchidism.
  • To emphasize the importance of timely surgical intervention.
  • To detail post-operative surveillance and counseling needs.

Main Methods:

  • Diagnosis relies on patient history and physical examination.
  • Surgical intervention is recommended by six months of age.
  • Endocrinologic evaluation is indicated for nonpalpable bilateral undescended testicles.

Main Results:

  • Early surgery significantly reduces risks associated with cryptorchidism.
  • Lifelong surveillance is necessary for fertility and cancer risk management.
  • Retractile testicles require annual monitoring until puberty.

Conclusions:

  • Prompt surgical correction of cryptorchidism is vital.
  • Comprehensive lifelong care, including self-examination, improves outcomes.
  • Management strategies should be tailored to individual patient needs.