santé (1) environnement (1) Development (1) Language (1) Children (1) Twins (1) Readiness for school (1) Parenting (1) Numeracy (1) Nature and nurture (1) Infants (1) Health (1) Euthenics (1) Ecology (1) Corporal punishment (1) Children (1) Child development (1) Adolescence (1) Adaptation (Biology) (1) Behavior (1) Infancy (1) Health (1) adolescence (1)