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In severe iodine deficient areas, iodine deficiency has been documented to be an important etiological factor leading to poor fetal growth and development. Iodine is essential for physical growth and development of the central nervous system of the fetus. Iodine deficiency in pregnant mothers leads to increased incidence of infertility and abortions, perinatal mortality and infant child mortality. The clinical iodine supplementation trials have documented adverse health consequences due to iodine deficiency. Evidence from observational studies concludes that prevention of iodine deficiency can lead to reduction in infant mortality rate and facilitate to achieve millennium development goal-4., (Copyright © 2012 Elsevier GmbH. All rights reserved.)