Three women presented 4-6 months after delivery with a goitre and spontaneously changing thyroid function believed to be due to autoimmune thyroiditis. All three patients had transient hypothyroidism and one initially had evidence of thyrotoxicosis. Hypothyroidism in autoimmune thyroiditis is generally regarded as permanent. However, evidence is now accumulating, and is reviewed here, to suggest that relapses or onset with transient thyrotoxicosis and hypothyroidism followed by spontaneous,

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... or less complete, remission occur in one or more varieties of thyroiditis in the postpartum period.