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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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The Y Chromosome Determines Maleness02:19

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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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Disorders of the Male Reproductive System01:20

Disorders of the Male Reproductive System

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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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Accessory Glands of the Male Reproductive System01:16

Accessory Glands of the Male Reproductive System

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The accessory ducts involved in sperm maturation and transportation include the epididymides, vasa deferentia, ejaculatory ducts, and urethra. These ducts play a critical role in the maturation, storage, 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. The epididymis can be divided into three main parts: the head, body, and tail. The head of the epididymis...
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Male Sexual Response: Erection & Ejaculation01:17

Male Sexual Response: Erection & Ejaculation

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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...
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Related Experiment Video

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Chronic Social Defeat Stress in Early Adolescent Male Mice
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Male contraception

F C Wu1

  • 1Department of Medicine, University of Manchester, U.K.

Bailliere'S Clinical Obstetrics and Gynaecology
|April 1, 1996
PubMed
Summary
This summary is machine-generated.

New male contraception methods are emerging, focusing on hormonal suppression of sperm production. Research shows Asian men respond better to testosterone treatments, potentially accelerating global adoption for family planning.

Keywords:
AndrogensBiologyContraceptionContraception ResearchContraceptive AgentsContraceptive Agents, MaleEndocrine SystemFamily PlanningHormonesLiterature ReviewPhysiologyReproductionSpermatogenesisTestosterone

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Area of Science:

  • Reproductive biology and endocrinology.
  • Male reproductive health and contraception.

Background:

  • Despite scientific advances, male contraception development lags due to low funding and industry disinterest.
  • Existing male contraceptive approaches rely on older principles or chance discoveries.

Purpose of the Study:

  • To highlight progress in male contraception despite limited resources.
  • To discuss the potential of hormonal male contraception and its ethnic variations.

Main Methods:

  • Review of recent studies on sex steroid-induced oligozoospermia.
  • Analysis of ethnic differences in response to hormonal suppression of spermatogenesis.

Main Results:

  • Confirmed contraceptive efficacy of sex steroid-induced oligozoospermia.
  • Identified distinct ethnic patterns in susceptibility to hormonal suppression, with Asian men showing greater responsiveness.
  • Long-acting testosterone esters show promise for large-scale application.

Conclusions:

  • Hormonal male contraception, particularly testosterone esters, offers a promising systemic method.
  • Ethnic variations in response necessitate tailored approaches for effective global implementation.
  • Increased contraceptive prevalence through male options can significantly impact population dynamics.