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BMC Pregnancy and Childbirth
Published in: BMC Pregnancy and Childbirth 1/2017

Open Access 01-12-2017 | Research article

Maternal iodine status during lactation and infant weight and length in Henan Province, China

Authors: Jin Yang, Lin Zhu, Xiaofeng Li, Heming Zheng, Zhe Wang, Zongyu Hao, Yang Liu

Published in: BMC Pregnancy and Childbirth | Issue 1/2017

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Abstract

Background

Infants are very sensitive to iodine deficiency. Breastfed infants are dependent on maternal iodine intake. The aim of this study was to evaluate the relationship between maternal iodine status during lactation and infant weight and length.

Methods

A cross-sectional survey was conducted to investigate maternal iodine status and infant anthropometric measures in Henan Province, China. Only exclusive breastfeeding mothers and their infants < 6 months of age (n = 747) were included in our final analysis. Urine samples were collected from all the mothers and infants. Infant weight and length were measured and converted into weight-for-age Z-score (WAZ) and height-for-age Z-score (HAZ) using the World Health Organization (WHO) AnthroPlus software.

Results

The median urinary iodine concentration (UIC) in lactating women was significant lower than that in their infants (177.4 vs 261.1 μg/L, P < 0.001). A positive correlation was found between maternal and infant urinary iodine concentration (r = 0.203, P < 0.01). The mean HAZ and WAZ values were lowest in the infants whose mothers had UIC below 50 μg/L (n = 41). Infant WAZ with maternal UIC below 50 μg/L was significantly lower than those with maternal UIC of 50 μg/L or above (P = 0.043). After adjusting for confounding factors, there were significant differences in infant WAZ between maternal UIC groups.

Conclusions

The present study suggests that maternal iodine status during lactation may be related to their infant anthropometric index. Appropriate iodine intake of lactating women is beneficial for their infants.
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Metadata
Title
Maternal iodine status during lactation and infant weight and length in Henan Province, China
Authors
Jin Yang
Lin Zhu
Xiaofeng Li
Heming Zheng
Zhe Wang
Zongyu Hao
Yang Liu
Publication date
01-12-2017
Publisher
BioMed Central
Published in
BMC Pregnancy and Childbirth / Issue 1/2017
Electronic ISSN: 1471-2393
DOI
https://doi.org/10.1186/s12884-017-1569-0

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