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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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Infertility in Females01:28

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Female infertility is defined as the inability to conceive after a year of regular, unprotected intercourse and affects about 10–15% of couples worldwide. The primary cause of female infertility is ovulatory disorders, which hinder the release of eggs. These disorders can be classified as hypothalamic amenorrhea, polycystic ovarian syndrome (PCOS), premature ovarian failure, and hyperprolactinemic anovulation disorders.
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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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In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
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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.
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Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
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Related Experiment Video

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Human Egg Maturity Assessment and Its Clinical Application
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The Association Between Long Working Hours and Infertility.

Joonho Ahn1, Sang Ha Lee2, Min Young Park1

  • 1Department of Occupational and Environmental Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.

Safety and Health at Work
|December 13, 2021
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Summary

Working long hours is linked to infertility in young Korean women. Adjusting work schedules may improve reproductive health outcomes for this demographic.

Keywords:
InfertilityRepublic of KoreaWomenWomen, working

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Area of Science:

  • Reproductive Health
  • Occupational Health
  • Epidemiology

Background:

  • Investigates the relationship between long working hours and infertility in female Korean workers.
  • Considers age as a critical factor in this association.

Purpose of the Study:

  • To determine if prolonged work hours contribute to infertility among Korean women.
  • To analyze age-specific risks associated with long working hours and infertility.

Main Methods:

  • Utilized data from the 2018 National Survey on Fertility and Family Health and Welfare in Korea.
  • Defined infertility as one year of regular unprotected intercourse without pregnancy.
  • Employed logistic regression models stratified by age (under/over 40) to assess infertility risk.

Main Results:

  • Long working hours showed a trend towards increased infertility risk (OR 1.303).
  • Significantly higher infertility risk was observed in women under 40 working long hours (OR 1.921).
  • No significant association was found for women aged 40 and older.

Conclusions:

  • Working long hours is associated with infertility, particularly in younger female workers.
  • Recommends restructuring work schedules to better accommodate young female employees' needs.