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Definition of Congenital hypothyroidism
Medically reviewed by Min Clinic Staff | Updated: January 2026
Congenital hypothyroidism:Underactivity of the thyroid gland at birth, which results in growth retardation, developmental delay, and other abnormal features. It can be due to deficiency of iodine in the mother's diet during pregnancy. Also referred to as cretinism. See: Cretinism.