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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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Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
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Interpersonal relationships progress through stages, beginning with awareness and moving toward mutuality, where emotional connections deepen. While many relationships remain at moderate levels of mutuality, deeper connections form through self-disclosure, trust, and interdependence.Self-DisclosureSelf-disclosure involves revealing personal information, starting with surface-level details and gradually progressing to more intimate content. As trust grows, individuals feel more comfortable...
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Lifestyle Factors and Health01:20

Lifestyle Factors and Health

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Lifestyle factors play a critical role in maintaining overall health and preventing chronic diseases. Key elements, such as regular physical activity, a nutritious diet, and abstinence from smoking, can significantly enhance physical, mental, and emotional well-being while reducing the risk of several life-threatening conditions.
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Studying the Complex Relationships Between Physical Activity and Infertility.

Kelly R Evenson1, Kathryn R Hesketh2

  • 1Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina - Chapel Hill, Chapel Hill, North Carolina, United States.

American Journal of Lifestyle Medicine
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Summary
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Physical activity

Keywords:
conceptionexercisefertilityin vitro fertilizationpregnancyrecreational activitysedentary behavior

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Area of Science:

  • Reproductive health and exercise science.

Background:

  • The relationship between physical activity and infertility is complex and requires further investigation.
  • Existing research presents equivocal evidence on the impact of exercise on fertility.
  • Unexplained infertility is a significant global health concern, necessitating identification of modifiable risk factors.

Purpose of the Study:

  • To critically evaluate the methodological challenges in studying the association between physical activity and infertility.
  • To highlight areas for future research, including sedentary behavior and effect modifiers.

Main Methods:

  • Commentary on existing literature, focusing on methodological issues in physical activity and infertility research.
  • Discussion of key components of physical activity: type, intensity, frequency, and duration.
  • Consideration of measurement techniques for physical activity and potential effect modifiers like age and body mass index.

Main Results:

  • Current research on physical activity and infertility suffers from methodologic limitations.
  • Defining and measuring physical activity consistently across studies is challenging.
  • Sedentary behavior is an understudied factor that may influence infertility.

Conclusions:

  • Standardizing the definition and measurement of physical activity is crucial for future research.
  • Investigating the role of sedentary behavior in infertility is warranted.
  • Identifying and quantifying the impact of modifiable risk factors like physical activity is essential for addressing global infertility concerns.