cohort (13) Children (12) Children (10) age (9) Age (9) Age (9) Models (9) association (8) Social groups (8) education (7) child (7) Education (7) Birth (7) Ci (Chinese poetry) (7) Parturition (7) Obesity (7) Labor (Obstetrics) (7) Education (7) Childbirth (7) Birth (7) childhood (7) birth (7) risk (6) health (6) Methods (6) Risk (6) Pregnancy (6) Meta-analysis (6) Health (6) Estimates (6)