Maternal Methyl-Nutrient Status and Infant Neurodevelopment Study

Inclusion Criteria for Pregnant Women * Aged 20-45 years * Singleton pregnancy * Receiving routine prenatal care at the study site and planning to deliver at Far Eastern Memorial Hospital Exclusion Criteria for Pregnant Women * Diagnosed with major chronic diseases, including renal disease (defined as chronic kidney disease stage 3 or above or history of renal transplantation), liver disease (defined as liver cirrhosis or history of liver transplantation), or malignancy * Alcohol consumption during pregnancy * Diagnosed with eating disorders or psychiatric conditions that may impair the assessment of nutritional status Inclusion Criteria for Newborns ● Newborns delivered by mothers who participate in this study Exclusion Criteria for Newborns * Diagnosed with congenital anomalies, epilepsy, or severe brain injury * Inability to complete neurodevelopmental assessments at 6 months, 1 year, and 2 years of age at the study site * Infants whose mothers are diagnosed with eating disorders or psychiatric conditions that may impair the assessment of nutritional status