Letter regarding ‘the association between serum iodine concentration in the first trimester and foetal ultrasound biometric parameters and birth size among Chinese pregnant women’

Key Points

• Birth size is positively associated with serum iodine concentration, highlighting the nutrient's role in fetal development.
• A significant finding shows that higher serum iodine levels in the first trimester correlate with improved ultrasound biometric parameters.
• This observational analysis involved Chinese pregnant women and assessed serum iodine concentration alongside growth metrics.
• Implications underscore the importance of adequate iodine intake during early pregnancy for optimal fetal growth.