Most<unk> ildren born with<unk>  and correctly treated with thyroxine grow and develop normally in all respects. Even most of those with athyreosis and undetectable T4 levels at birth develop with normal intelligence, although as a population academic performance tends to be below that of siblings and mild learning problems occur in some.<unk>  is the most common preventable cause of intellectual disability. Few treatments in the practice of medicine provide as large a benefit for as small an effort. The developmental quotient (DQ, as per Gesell Developmental Schedules) of<unk> ildren with<unk>  at age 24 months that have received treatment within the first 3 weeks of birth is summarised below: . Adaptive behavior Fine motor Gross motor Language Personal-social behavior Severe<unk>  92 89 90 89 90 Moderate<unk>  97 97 98 96 96 Mild<unk>  100 99 100 99 100
Congenital hypothyroidism
Congenital iodine deficiency syndrome
Congenital adrenal hyperplasia
Thyroid dysgenesis
Late onset congenital adrenal hyperplasia
Lipoid congenital adrenal hyperplasia
Congenital hyperinsulinism
Isolated growth hormone deficiency