A most common cause of Neonatal Hypothyroidism is: (A) Throid dysgenesis, (B) Transplacental maternal thyroid antibodies, (C) Inherited genetic disorders, (D) Decreased thyroglubin
Answer is A. Iodine deficiency is the commonest cause of congenital hypothyroidism in certain parts of India, while thyroid dysgenesis is the most common aetiology in non-endemic areas (75% of all cases).