Brésil (5) Birth (4) Parturition (4) Labor (Obstetrics) (4) Childbirth (4) Birth (4) naissance (4) nourisson (3) risque (3) information (3) taux (3) Methods (3) Risk (3) Education (3) Birth weight, Low (3) Methods (3) Schooling (3) Risk factors (3) cohorte (3) nourrisson (3) tabagisme (2) modèle (2) âge (2) ville (2) Rates (2) Smoking (2) Prenatal care (2) Pregnancy (2) Paradox (2) Manufacturers' agents (2)