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China
Pregnancy
Newborn Infant
Small for Gestational Age Infant
Multiple Birth Offspring
Neural Tube Defects
Cleft Lip
Pregnancy Induced Hypertension
Cerebral Palsy
Cleft Palate
Body Mass Index
Risk Factors
Prevalence
Logistic Models
Low Birth Weight Infant
Maternal Age
Incidence
Folic Acid
Population Surveillance
Preconception Care
Co-Publications
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