date:Aug 01, 2012
recommends 200-300 g of iodine daily during pregnancy for normal fetal thyroid hormone production and neurocognitive development, 1,100 g is considered to be the safe upper limit for daily ingestion by the US Institute of Medicine.
Globally congenital hypothyroidism is most commonly caused by a deficiency of iodine. However excess iodine may also be part of the explanation for the reported increasing incidence in recent years.
However, the team noted that because it is not routine practice to