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Variation of iodine status during pregnancy and its associations with thyroid function in women from Rio de Janeiro, Brazil
Public Health Nutrition
Objective To assess iodine status and its effects on maternal thyroid function throughout pregnancy. Design In the present prospective cohort study, three urinary samples were requested for urinary iodine concentration (UIC) determinations in both the first and third gestational trimesters. Serum thyrotropin (TSH) and free thyroxine (FT4) were analysed in both trimesters and thyroid antibodies were assessed once. Setting Rio de Janeiro, Brazil. Participants First-trimester pregnant women (ndoi:10.1017/s1368980019000399 pmid:30846017 fatcat:7flzqb2curfgjjvc7yfv7zp6cu