Female 69 female 69 mother Humans 68 human 68 psychology 63 Mothers 59 male 59 Male 58 child 54 adult 49 Adult 47 Child 44 child parent relation 36 preschool child 35 Child, Preschool 34 Parenting 27 adolescent 22 Adolescent 21 mother child relation 21 Mother-Child Relations 20 Article 19 controlled study 18 physiology 17 longitudinal study 16 mental stress 16 Stress, Psychological 15 depression 15 infant 15 Infant 14