Postpartum maternal iodine status and the relationship to neonatal thyroid function.

Area of Science:

• Endocrinology
• Neonatal Health
• Public Health Nutrition

Background:

• Iodine deficiency during the postpartum period poses risks to neonatal neuropsychointellectual development.
• Accurate assessment of iodine status in lactating mothers is crucial for infant health.
• Understanding the relationship between maternal iodine intake and neonatal thyroid function is essential.

Purpose of the Study:

• To investigate the prevalence of iodine deficiency in postpartum women.
• To examine the relationship between maternal iodine status (urine and breast milk) and neonatal thyroid stimulating hormone (TSH).
• To identify reliable indicators of maternal iodine status.

Main Methods:

• Cross-sectional study of 50 postpartum women and their neonates.
• Measurement of maternal urine iodine concentration (UIC) and breast milk iodine.
• Assessed neonatal whole-blood TSH levels.

Main Results:

• High prevalence of iodine deficiency (58%) observed in postpartum women (UIC < 50 microg/L).
• Breast milk iodine correlated significantly with maternal urine iodine expressed as microg/g creatinine (r = 0.52, p < 0.001).
• Higher breast milk iodine levels were positively correlated with increased neonatal TSH (r = 0.42, p = 0.003).

Conclusions:

• Postpartum iodine deficiency is prevalent, impacting lactating mothers.
• Urine iodine concentration normalized to creatinine is a reliable indicator of breast milk iodine.
• Further research is needed on the impact of breast milk iodine on neonatal TSH and neurodevelopment.