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Postpartum thyroiditis is a common but frequently unrecognized disorder, affecting approximately 5% of women during the first 12 months after delivery. It is characterized by transient hyperthyroidism occurring about 14 weeks postpartum followed by transient hypothyroidism at 19 weeks postpartum. Our aim is to investigate the prevalence of positive antimicrosomal antibody in women 3 months postpartum and an association of antimicrosomal antibody with symptomatic and biochemical thyroid disorders. We used data collected from 205 women who visited Dankook University Hospital in 3 months postpartum, Our results showed that the rate of positive antithyroid microsomal antibody was 12.7% in women 3 months postpartum and the prevalence of biochemical hyperthyroidism and biochemical hypothyroidism with positive antithyroid microsomal antibody women 3 months postpartum were 26.9% and 19.2%, respectively. The prevalence of postpartum biochemical thyroid dysfuncion 3 months postpartum was 13.7%. There was no relationship between any of the following factors and thyroid antibody status: fetal distress, birth weight and infant sex, matemal age, experiences and mode of delivery, previous medical disease(such as pstrointestinal and psychotic diseases), experiences of previous abortions, gestational age and past history of thyroid diseases.
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