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Related Concept Videos

Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

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...
Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...
Graves' Disease I: Introduction01:28

Graves' Disease I: Introduction

Graves' disease is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence in...
Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...
Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
Synthesis and Regulation of Thyroid Hormones01:20

Synthesis and Regulation of Thyroid Hormones

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.
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The iodine is then...

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Related Experiment Video

Updated: Jun 26, 2026

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility
04:22

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility

Published on: May 30, 2025

The relationship between premature ejaculation and hyperthyroidism.

Ahmet Cihan1, Omer Demir, Tevfik Demir

  • 1Department of Urology, Dokuz Eylul University School of Medicine, Inciralti, Izmir, Turkey.

The Journal of Urology
|February 3, 2009
PubMed
Summary

Hyperthyroidism is linked to premature ejaculation (PE) in men. Treating hyperthyroidism significantly improves intravaginal ejaculation latency time, suggesting a reversible cause for PE.

Related Experiment Videos

Last Updated: Jun 26, 2026

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility
04:22

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility

Published on: May 30, 2025

Area of Science:

  • Endocrinology
  • Sexual Medicine
  • Clinical Research

Background:

  • Hyperthyroidism, a condition of excess thyroid hormone, can impact various bodily functions.
  • Premature ejaculation (PE) is a common sexual dysfunction affecting many men.
  • The relationship between hyperthyroidism and PE requires further investigation.

Purpose of the Study:

  • To determine the prevalence of premature ejaculation (PE) in patients with hyperthyroidism.
  • To assess changes in intravaginal ejaculation latency time (IELT) before and after hyperthyroidism treatment.

Main Methods:

  • Study included 49 hyperthyroid patients without prior treatment.
  • Evaluated sexual history, erectile function, ejaculation control, and IELT via stopwatch.
  • Assessed anxiety levels and IELT changes 8 weeks post-euthyroidism.

Main Results:

  • 72.1% of patients had PE; 69.8% had definite PE by stopwatch.
  • Mean IELT was 72.8 seconds; higher anxiety in PE patients.
  • Significant IELT improvement observed after achieving euthyroidism.

Conclusions:

  • Excess thyroid hormone and PE are clinically interrelated.
  • Hyperthyroidism is a potential reversible cause of premature ejaculation.
  • Considering hyperthyroidism in PE etiology is recommended.