Iodine Nutrition Status in Pregnant Women in Mexico

García‐Solís, Pablo; Solís-S, Juan Carlos; García-Gaytán, Ana Cristina; Reyes-Mendoza, Vanessa Amaranta; Robles‐Osorio, Ludivina; Hernández‐Montiel, Hebert Luis; Leo-Amador, Guillermo Enrique

doi:10.1089/thy.2011.0197

Cited by 15 publications

(15 citation statements)

References 17 publications

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“…With the progression of pregnancy, the median UIC either declined in Ireland [41], the United Kingdom [41], Switzerland [45], Bosnia and Herzegovina [48], Iran [46], India [52], Tasmania (Australia) [47] and Japan [24] or increased in iodinedeficient areas from Spain [49], France [51,53] and Hong Kong [43]. However, a statistically significant change was observed only in one study from Hong Kong [43], and the median UICs were not different between gestational stages in the studies from Sweden [42], northern Paris (France) [51], Sudan [42], Iran [44], Sri Lanka [41], Mexico [50] and Japan [24]. All regions except Sudan and northern Paris are regarded as optimal iodine status suggesting that under the situation of sufficient iodine intake the increased renal balanced against the risk of iodine excess particularly in Japan, an iodine-sufficient area.…”

Section: Relationship Between Maternal Tsh Ft 4 Uic and Neonatal Tshmentioning

confidence: 95%

“…However, the longitudinal analysis of data revealed a significant decrease of UIC at mid-gestation. The gestational change of UIC has been reported from various countries and the results are discordant irrespective of the iodine status of the study subjects or areas [24,[40][41][42][43][44][45][46][47][48][49][50][51][52][53]. The peak UIC value is observed at the first trimester in Ireland [40][41], Switzerland [45], Bosnia and Herzegovina [48], Iran [46], Sri Lanka [41], Tasmania (Australia) [47] and Japan [24], at the second trimester in Iran [44] and Mexico [50] or at the third trimester in Sweden [42], France [53], Sudan [42] and Hong Kong [43].…”

Section: Relationship Between Maternal Tsh Ft 4 Uic and Neonatal Tshmentioning

confidence: 97%

“…The gestational change of UIC has been reported from various countries and the results are discordant irrespective of the iodine status of the study subjects or areas [24,[40][41][42][43][44][45][46][47][48][49][50][51][52][53]. The peak UIC value is observed at the first trimester in Ireland [40][41], Switzerland [45], Bosnia and Herzegovina [48], Iran [46], Sri Lanka [41], Tasmania (Australia) [47] and Japan [24], at the second trimester in Iran [44] and Mexico [50] or at the third trimester in Sweden [42], France [53], Sudan [42] and Hong Kong [43]. With the progression of pregnancy, the median UIC either declined in Ireland [41], the United Kingdom [41], Switzerland [45], Bosnia and Herzegovina [48], Iran [46], India [52], Tasmania (Australia) [47] and Japan [24] or increased in iodinedeficient areas from Spain [49], France [51,53] and Hong Kong [43].…”

Section: Relationship Between Maternal Tsh Ft 4 Uic and Neonatal Tshmentioning

confidence: 97%

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Gestational changes of thyroid function and urinary iodine in thyroid antibody-negative Japanese women

2013

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Section: Relationship Between Maternal Tsh Ft 4 Uic and Neonatal Tshmentioning

confidence: 95%

Section: Relationship Between Maternal Tsh Ft 4 Uic and Neonatal Tshmentioning

confidence: 97%

Section: Relationship Between Maternal Tsh Ft 4 Uic and Neonatal Tshmentioning

confidence: 97%

See 1 more Smart Citation

Gestational changes of thyroid function and urinary iodine in thyroid antibody-negative Japanese women

2013

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“…Garcia-Solis et al explained their findings by the fact that iodized salt plays an important role in sustaining iodine nutrition in pregnant women (33) .…”

Section: Discussionmentioning

confidence: 99%

Iodine and iron status of pregnant women in Lubumbashi, Democratic Republic of Congo

Habimana

Twite

Wallemacq

et al. 2013

Public Health Nutr.

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Objective: Adequate iodine and Fe intakes are imperative during pregnancy to prevent fetal defects, but such data are not available in the Democratic Republic of Congo. We aimed to assess iodine and Fe status in pregnant women from Lubumbashi. Design: Cross-sectional study. We measured urinary iodine concentration (UIC) in random urine samples using a modified Sandell-Kolthoff digestion method; the WHO reference medians were used to classify iodine intake as deficient, adequate, more than adequate or excessive. Serum ferritin concentrations were measured by immunoenzymatic assay and considered insufficient when ,12 ng/ml. Setting: Maternity units from rural, semi-urban and urban areas of Lubumbashi, Democratic Republic of Congo. Subjects: Two hundred and twenty-five randomly selected pregnant women attending prenatal consultation, seventy-five postpartum women and seventy-five non-pregnant women as controls. Results: Overall median UIC in pregnant women was 138 (interquartile range: 105-172) mg/l, indicating iodine deficiency, whereas postpartum and nonpregnant women had adequate iodine intake: median UIC 5 144 mg/l and 204 mg/l, respectively. Median UIC values were lower in late pregnancy than in early pregnancy: in the first, second and third trimester respectively 255 mg/l, 70 mg/l and 88 mg/l in the rural area; 306 mg/l, 166 mg/l and 68 mg/l in the semi-urban area; and 203 mg/l, 174 mg/l and 99 mg/l in the urban area. Fe was insufficient in 39 % of pregnant women compared with 21 % of non-pregnant and postpartum women. In the third trimester, deficiencies in both iodine and Fe were high: 40 %, 12 % and 18 % in the rural, semi-urban and urban areas, respectively. Conclusions: Our data suggest that pregnant women are at risk of iodine and Fe deficiencies in Lubumbashi. Country policies fighting against iodine and Fe deficiencies during pregnancy should be reinforced.

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“…Thus, no universal rule can be given on the association between UIC in schoolchildren and in pregnant women. Similarly, the reports on the change in UIC during the three trimesters of pregnancy are diverse [3], with some authors reporting an increase [22,23,24,25,26], other researchers a decrease [27,28,29,30] and still other authors observing no change [31,32,33,34,35] between the different trimesters of pregnancy. No consistent pattern in the median UIC by trimester of pregnancy can be derived from these studies.…”

Section: Methods To Evaluate Id In Pregnant Womenmentioning

confidence: 99%

Iodine Supplementation in Pregnancy and the Dilemma of Ambiguous Recommendations

Andersen¹,

Laurberg²

2016

Eur Thyroid J

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Iodine requirements are increased during pregnancy, predominantly caused by an increase in renal iodide clearance and in the use of iodine for thyroid hormone production. Because iodine deficiency (ID) in pregnancy may be associated with neurodevelopmental deficits in the offspring, a pertinent question is at what level of iodine intake pregnant women should be advised to take iodine-containing supplements. The consensus reached by the WHO/UNICEF/ICCIDD in 2007 was that pregnant women should not be recommended to take iodine-containing supplements if the population in general had been iodine sufficient for at least 2 years. However, guidance on this differs between scientific societies. This review discusses iodine supplementation in pregnancy. Based on current evidence, the recommendations given by WHO/UNICEF/ICCIDD in 2007 provide a valid guidance on the use of iodine supplements in pregnant women. Women living in a population with a median urinary iodine concentration (UIC) at or above 100 µg/l are not in need of iodine supplementation in pregnancy. On the other hand, if the population median UIC is below 100 µg/l, pregnant women should take iodine-containing supplements until the population in general has been iodine sufficient for at least 2 years by way of universal salt iodization.

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Iodine Nutrition Status in Pregnant Women in Mexico

Cited by 15 publications

References 17 publications

Gestational changes of thyroid function and urinary iodine in thyroid antibody-negative Japanese women

Gestational changes of thyroid function and urinary iodine in thyroid antibody-negative Japanese women

Iodine and iron status of pregnant women in Lubumbashi, Democratic Republic of Congo

Iodine Supplementation in Pregnancy and the Dilemma of Ambiguous Recommendations

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