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Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
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The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
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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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Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...
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Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies
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Thyroid and male reproduction.

Anand Kumar1, Skand Shekhar2, Bodhana Dhole1

  • 1Department of Reproductive Biology, All India Institute of Medical Sciences, New Delhi, Intern, India.

Indian Journal of Endocrinology and Metabolism
|April 5, 2014
PubMed
Summary
This summary is machine-generated.

Thyroid hormones modulate the male reproductive axis, impacting sexual and sperm production functions. This review explores how thyroid hormones influence male reproductive health and the hypothalamo-hypophyseal testicular axis.

Keywords:
HyperthyroidismLeydig cellsSertoli cellsTri-iodothyroninehypothyroidismsperm function

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Area of Science:

  • Endocrinology
  • Reproductive Biology
  • Andrology

Background:

  • Male reproduction relies on the hypothalamo-hypophyseal testicular axis involving GnRH, LH, FSH, and testosterone.
  • Thyroid hormones are known to influence this axis and male reproductive functions.

Purpose of the Study:

  • To review the modulatory effects of thyroid hormones on the male reproductive system.
  • To examine the impact of thyroid hormones on sexual and spermatogenic functions in men.

Main Methods:

  • Literature review of studies investigating thyroid hormone influence on male reproduction.
  • Analysis of the interaction between thyroid hormones and the hypothalamo-hypophyseal testicular axis.

Main Results:

  • Thyroid hormones exert a significant modulatory influence on male reproductive functions.
  • Disruptions in thyroid hormone levels can affect sexual and spermatogenic capacity.

Conclusions:

  • Thyroid hormone status is crucial for maintaining normal male reproductive health.
  • Understanding this relationship is vital for diagnosing and treating male infertility.