Hypothyroid babies being breast-fed (12 cases) or bottle-fed (33 cases) have been compared. Anthropometric measurements at referral as well as biochemical values including plasma T4, T3, and thyroid-stimulating hormone were not significantly different. Bone maturation expressed as number of ossification centers or their surface were identical. Babies from both groups had similar psychologic performance at their first anniversay. It is concluded that breast-feeding does not protect against the deleterious effects of congenital hypothyroidism,.
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Letarte et al. (1980) studied this question.