There is lack of data on the magnitude and different forms of thyroid dysfunction among pregnant women of Sri Lanka. Few studies have looked at the prevalence of iodine deficiency and autoimmune thyroid disease which are the two leading causes of hypothyroidism in pregnancy.In a cross sectional, nationally representative sample of pregnant women in Sri Lanka, median urinary iodine level was 113.7μg/l, which was far below the WHO recommendation of a level between 150 and 249 μg/l, indicating inadequate iodine status
of pregnant women in Sri Lanka.