Mother-Infant Cohort Study in Malaysia and China

This study is following pregnant women and their babies in Malaysia and China to understand how a mother's health and environment during early pregnancy affect her child's health in the first year of life. **You may be eligible if:** - You are pregnant and aged 18–45 - You are in the first trimester of pregnancy (less than 12 weeks along) - You attend prenatal checkups at one of the participating clinics or hospitals - You plan to continue attending postnatal follow-ups at the same location for at least one year **You may NOT be eligible if:** - You have been diagnosed with an immune deficiency condition - You are carrying multiple babies (twins, triplets, etc.) or are at risk of preterm delivery before 37 weeks - You plan to move away from the study area within the next year - Your baby has been diagnosed with a congenital abnormality Talk to your doctor to see if this trial is right for you.