Data from 2007 regarding iodine status among Portuguese pregnant women indicate this is an iodine deficient population group, with only 16.8% presenting adequate urinary iodine values. This may have serious implications for normal cognitive development of the offspring and a concerning socioeconomic impact. In 2013, concerns by the Portuguese Directorate-General of Health lead to the implementation of a public health policy (nº 011/2013) recommending iodine supplementation during pregnancy. IoMum emerges from this context to monitor and update iodine status in Portuguese pregnant women and to evaluate the effectiveness of the above policy by assessing clinical compliance to iodine supplementation and the impact of iodine supplementation in this vulnerable group. IoMum will update data on iodine nutrition in Portuguese pregnant women, promoting political actions towards the elimination of iodine deficiency and thus to the reduction of nutritional, social and economic inequalities.
Study Type
OBSERVATIONAL
Enrollment
485
UIC
Faculty of Medicine of the University of Porto
Porto, Portugal
1st trimester urinary iodine concentration
Median urinary iodine concentration at 1st trimester of gestation
Time frame: Between gestational weeks 10 and 13 plus 6 days (one timepoint collection - Timepoint 1)
Rate of compliance to iodine supplementation guideline
Rate of compliance to iodine supplementation guideline at 1st trimester of gestation
Time frame: Between gestational weeks 10 and 13 plus 6 days (one timepoint collection - Timepoint 1)
Change in median iodine-to-creatinine ratio
Change in median iodine-to-creatinine ratio between 1st and 3rd trimesters of gestation
Time frame: Up to 31 weeks
Proportion of pregnant women with insufficient, adequate or excessive iodine intake
Classification of pregnant women by urinary iodine concentration levels according to WHO criteria (insufficient, adequate or excessive iodine intake) at 1st trimester of gestation.
Time frame: Between gestational weeks 10 and 13 plus 6 days (one timepoint collection - Timepoint 1)
Maternal median thyroglobulin
Maternal median thyroglobulin at 3rd trimester of gestation
Time frame: Between gestational weeks 35 and 41 (one timepoint collection - Timepoint 2)
1st trimester mean sodium excretion
Mean sodium excretion at 1st trimester of gestation
Time frame: Between gestational weeks 10 and 13 plus 6 days (one timepoint collection - Timepoint 1)
3rd trimester mean sodium excretion
Mean sodium excretion at 3rd trimester of gestation
Time frame: Between gestational weeks 35 and 41 (one timepoint collection - Timepoint 2)
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