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Infertility in Males01:23

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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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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.
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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...
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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...
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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.
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The reproductive system generates offspring, ensuring the survival of the species. In humans, the reproductive system is complex and involves a variety of organs and hormones that work together to ensure successful reproduction.
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Hypogonadism and Cryptorchidism.

Wiwat Rodprasert1,2, Helena E Virtanen1,2, Juho-Antti Mäkelä1,2

  • 1Research Centre for Integrative Physiology and Pharmacology, Institute of Biomedicine, University of Turku, Turku, Finland.

Frontiers in Endocrinology
|February 4, 2020
PubMed
Summary
This summary is machine-generated.

Congenital cryptorchidism, or undescended testis, affects many boys and can lead to fertility issues and increased cancer risk. Early treatment is standard, but its benefits on testicular function remain debated.

Keywords:
Leydig cellSertoli cellgonadotropinstestosteroneundescended testis

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Area of Science:

  • Pediatric Urology
  • Endocrinology
  • Reproductive Medicine

Background:

  • Congenital cryptorchidism (undescended testis) is a common male birth defect with prevalence ranging from 1.8-8.4%.
  • It is linked to reduced semen quality, increased testicular germ cell tumor risk, and impaired testicular hormone production.
  • Androgens and insulin-like peptide 3 (INSL3) are crucial for testicular descent during fetal development.

Purpose of the Study:

  • To review the role of hormones in testicular descent and the long-term consequences of cryptorchidism on male reproductive health.
  • To evaluate the effectiveness of current treatments, including orchiopexy and hormonal therapies, for cryptorchidism.
  • To highlight the need for further research into infantile hormonal treatments for cryptorchidism.

Main Methods:

  • Literature review and synthesis of existing research on cryptorchidism, testicular descent, and hormonal influences.
  • Analysis of studies examining the association between cryptorchidism and male reproductive outcomes.
  • Evaluation of current clinical guidelines and evidence regarding treatment efficacy.

Main Results:

  • Cryptorchidism is associated with impaired Sertoli and Leydig cell function, with germ cell loss proportional to the duration of undescended testis.
  • Early orchiopexy is the standard treatment, but its benefits on long-term testicular endocrine function are debated.
  • Hormonal treatments (hCG, GnRH) have low success rates and are not currently recommended, though their role in infancy warrants further investigation.

Conclusions:

  • Cryptorchidism significantly impacts male reproductive health, necessitating careful management.
  • While early surgical intervention is standard, its endocrine benefits require more evidence.
  • Further research is essential to clarify the long-term effects of early hormonal interventions on male fertility and health.