Female Humans 45 Mothers child female 45 human 45 mother 45 psychology 41 Child 39 male 39 Male 38 adult 31 Adult 29 child parent relation 25 preschool child 24 Child, Preschool 23 Parenting 21 mother child relation 18 Mother-Child Relations 17 adolescent 17 Adolescent 16 Article 15 longitudinal study 15 Longitudinal Studies 12 child behavior 11 controlled study 11 infant 11 physiology 11 prospective study 11 Child Behavior 10