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Related Concept Videos

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...
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...
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...
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...
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 5, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
04:39

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

Thyroid autoimmunity and miscarriage: a meta-analysis.

Lili Chen1, Renming Hu

  • 1Department of Endocrinology, Huashan Hospital, Fudan University, No. 12 Middle Wulumuqi Road, Shanghai, P. R. China.

Clinical Endocrinology
|January 5, 2011
PubMed
Summary
This summary is machine-generated.

Thyroid autoimmunity (TAI) significantly increases miscarriage risk in euthyroid women. This meta-analysis confirms TAI as a risk factor for spontaneous pregnancy loss.

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Last Updated: Jun 5, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
04:39

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Multiplexed Fluorescent Immunohistochemical Staining of Four Endometrial Immune Cell Types in Recurrent Miscarriage
05:16

Multiplexed Fluorescent Immunohistochemical Staining of Four Endometrial Immune Cell Types in Recurrent Miscarriage

Published on: August 4, 2021

Area of Science:

  • Reproductive Endocrinology
  • Immunology
  • Obstetrics & Gynecology

Background:

  • Thyroid autoimmunity (TAI) is an immune condition affecting thyroid function.
  • The link between TAI and miscarriage in euthyroid women requires further investigation.
  • Understanding this association is crucial for reproductive health management.

Purpose of the Study:

  • To determine if thyroid autoimmunity is linked to a higher risk of miscarriage.
  • To synthesize existing evidence on TAI and spontaneous pregnancy loss in euthyroid individuals.
  • To provide a quantitative assessment of the risk.

Main Methods:

  • A systematic review and meta-analysis of relevant studies was conducted.
  • Electronic databases (Medline, PubMed, EMBASE, Cochrane Library) were searched up to October 2010.
  • Pooled odds ratios and relative risks were calculated for case-control and cohort studies, respectively.

Main Results:

  • Twenty-two studies involving 53 publications were included in the meta-analysis.
  • A significant association was found between TAI and miscarriage (OR 2.55, RR 2.31).
  • Women with TAI had slightly higher age and TSH levels.

Conclusions:

  • Thyroid autoimmunity is associated with an increased risk of spontaneous miscarriage in euthyroid women.
  • TAI should be considered a risk factor for miscarriage.
  • Further research may refine management strategies for women with TAI.