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Table 1 Causes of Hyperthyroidism in Pregnancy [33]

From: Graves’ hyperthyroidism in pregnancy: a clinical review

Thyroid Disease  
 Graves’ disease  
 Chronic thyroiditis  
 Painless thyroiditis  
 Subacute thyroiditis  
 Toxic adenoma  
 Multinodular goiter  
Non-autoimmune hyperthyroidism  
 Gestational transient thyrotoxicosis  
 Multiple gestations  
 Trophoblastic disease  
 Hyperplacentosis  
 Hyperreactio luteinalis  
 TSH receptor mutation  
 TSH-producing pituitary adenoma  
Iatrogenic  
 Excessive levothyroxine (LT4) intake  
  Overtreatment  
  Factitious  
 Drugs  
  Iodine  
  Amiodarone  
  Lithium