Age (2) Population (2) Population (2) Population (2) Âge (2) population (2) Chili (2) Children (1) Prevention (1) Poverty (1) Mothers (1) Marginality, Social (1) Informers (1) Premature infants (1) Newborn infants (1) Impact (1) Gravity (1) Face (1) Economics (1) Childbirth (1) Birth weight (1) Average (1) Evolution (1) Protection (1) Marginación social (1) Madres (1) Pobreza (1) Niños recién nacidos (1) Niños prematuros (1) Evolucionismo (1)