Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Insufficient Sleep and Sleep Deprivation01:13

Insufficient Sleep and Sleep Deprivation

939
Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
Sleep deprivation is a more severe form of sleep loss...
939
Stages of Sleep01:22

Stages of Sleep

1.4K
Sleep progresses through distinct stages, each characterized by specific brain wave patterns and physiological responses ranging from wakefulness to stages of non-rapid eye movement, known as non-REM, to rapid eye movement, referred to as REM. Understanding these stages helps in recognizing how sleep supports various bodily and cognitive functions.
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
1.4K
Understanding Sleep01:11

Understanding Sleep

1.6K
Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
1.6K
Sleep Apnea01:21

Sleep Apnea

567
Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
The condition is more prevalent among...
567
Cell Size01:22

Cell Size

127.4K
Cell sizes vary widely among and within organisms. Bacterial cells range between 1-10 micrometers (μm)and are considerably smaller than most eukaryotic cells. The smallest bacteria are 0.1 μm in diameter—about a thousand times smaller than eukaryotic cells, which typically range from 10-100 μm.
Surface Area
Cells can take in nutrients and water via diffusion through the plasma membrane itself or through specific channels in the membrane. The area of the membrane surrounding...
127.4K
Sleepwalking and Sleep Talking01:17

Sleepwalking and Sleep Talking

1.0K
Somnambulism, commonly known as sleepwalking, involves individuals engaging in activities ranging from simple walking to more complex behaviors such as driving. Sleepwalking typically occurs during the slow-wave sleep stages 3 and 4 early in the night when the person is not dreaming, contradicting the myth that sleepwalkers are acting out their dreams.
Factors that increase the likelihood of sleepwalking include sleep deprivation and alcohol consumption. Contrary to common beliefs, it is safe...
1.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Inhibiting biofilm growth on ammonium salt-functionalized or fluorinated voice prostheses silicone.

Applied microbiology and biotechnology·2026
Same author

Botanical Origin-Dependent Phytochemical Profiles and Pharmaceutical Properties of Medical-Grade Honeys: Transdermal Delivery and Antibacterial Efficacy in a Wound Fluid Model.

Molecules (Basel, Switzerland)·2026
Same author

Assessment of biofilm growth on voice prostheses using a tracheoesophageal fistula simulator.

Otolaryngologia polska = The Polish otolaryngology·2026
Same author

Sex-specific omics scores of sex hormones and associations with metabolic and sleep disorders.

medRxiv : the preprint server for health sciences·2026
Same author

The effect of intermittent fasting on liver morphology in non-alcoholic fatty liver disease: A narrative review of animal studies and clinical trials.

Histology and histopathology·2026
Same author

Content of Fatty Acid and Eicosanoids in Muscle and Intestinal Tissue of C57BL/6 Mice Subjected to Long-Term Caloric Restriction.

Nutrients·2026

Related Experiment Video

Updated: Feb 3, 2026

Noninvasive, High-throughput Determination of Sleep Duration in Rodents
07:33

Noninvasive, High-throughput Determination of Sleep Duration in Rodents

Published on: April 18, 2018

8.3K

Sleep Duration Is Associated With Testis Size in Healthy Young Men.

Wenyi Zhang1, Katarzyna Piotrowska1, Bahman Chavoshan2,3

  • 1Division of Endocrinology, Department of Medicine, Harbor UCLA Medical Center and Los Angeles Biomedical Research Institute, Torrance, California.

Journal of Clinical Sleep Medicine : JCSM : Official Publication of the American Academy of Sleep Medicine
|October 25, 2018
PubMed
Summary

Adequate sleep duration is linked to larger testis size and healthier reproductive potential in men. This study found a positive correlation between sleep duration and testicular volume, suggesting sleep impacts male fertility.

Keywords:
actigraphyfertilitymalesleeptestis

More Related Videos

Teratoma Generation in the Testis Capsule
05:24

Teratoma Generation in the Testis Capsule

Published on: November 7, 2011

21.4K
The Sleep Nullifying Apparatus: A Highly Efficient Method of Sleep Depriving Drosophila
06:06

The Sleep Nullifying Apparatus: A Highly Efficient Method of Sleep Depriving Drosophila

Published on: December 14, 2020

4.2K

Related Experiment Videos

Last Updated: Feb 3, 2026

Noninvasive, High-throughput Determination of Sleep Duration in Rodents
07:33

Noninvasive, High-throughput Determination of Sleep Duration in Rodents

Published on: April 18, 2018

8.3K
Teratoma Generation in the Testis Capsule
05:24

Teratoma Generation in the Testis Capsule

Published on: November 7, 2011

21.4K
The Sleep Nullifying Apparatus: A Highly Efficient Method of Sleep Depriving Drosophila
06:06

The Sleep Nullifying Apparatus: A Highly Efficient Method of Sleep Depriving Drosophila

Published on: December 14, 2020

4.2K

Area of Science:

  • Reproductive Endocrinology
  • Sleep Medicine
  • Male Reproductive Health

Background:

  • Sleep influences numerous physiological processes.
  • The connection between sleep duration and male reproductive potential, specifically testis size, remains understudied.
  • Testis size is a key indicator of male reproductive capacity.

Purpose of the Study:

  • To investigate the relationship between sleep duration and testis size in healthy men.
  • To explore correlations between sleep parameters (duration, architecture) and reproductive hormones (testosterone, FSH, LH).

Main Methods:

  • Cross-sectional analysis of 92 healthy men.
  • Sleep measured via actigraphy and polysomnography.
  • Testicular volume assessed using Prader orchidometer; hormone levels analyzed by mass spectrometry and immunoassay.

Main Results:

  • A significant positive correlation was found between sleep duration and testicular volume (r = .31, P = .046).
  • Sleep duration also correlated with Follicle-Stimulating Hormone (FSH) (r = -.30, P = .035).
  • Rapid eye movement (REM) sleep showed a strong correlation with FSH (r = .44, P = .006).

Conclusions:

  • A positive linear relationship exists between sleep duration and testis volume.
  • A potential inverse U-shaped relationship between sleep duration and testis volume was observed.
  • Further longitudinal studies are needed to confirm causality and determine optimal sleep duration for male reproductive health.