• Postpartum painless thyroiditis with transient hyperthyroidism is being recognized with increasing frequency. Evidence tends to support an autoimmune cause. We treated a 33-year-old woman who experienced typical postpartum painless thyroiditis. Her sister had had a similar episode 13 years previously, and their mother had had postpartum hyperthyroidism 42 years earlier. We believe that this familial association provides further support for autoimmunity in postpartum thyroiditis.
(Arch Intern Med 1985;145:240-242)