Adolescent 1 Adolescent Mothers 1 Brazil 1 Child, Preschool 1 EEG 1 Female 1 Humans 1 Infant 1 Mother-Child Relations 1 Mothers 1 Parenting 1 Pregnancy 1 adolescent 1 child parent relation 1 controlled study 1 female 1 home-visiting intervention 1 human 1 infant 1 infant social development 1 maternal care competencies 1 mother 1 mother child relation 1 mother-infant attachment pregnancy 1 preschool child 1 randomized controlled trial 1