“…The scientific literature has already identified several factors with a negative impact on the success of family reunification, which are frequently classified into three groups: child characteristics, family characteristics, and child welfare service characteristics. With regards to the child-related characteristics that have a negative impact on the success of reunification, the scientific literature highlights children’s emotional problems, externalizing behaviours, and mental health problems [ 21 , 29 , 30 , 35 , 36 , 37 ]; attachment issues [ 38 ]; special needs due to physical problems [ 29 , 35 ]; cognitive difficulties [ 21 ]; children’s exposure to illicit substances in the prenatal period [ 29 ]; and the age of the child, particularly infants, pre-teens, and adolescents [ 24 , 28 , 35 , 37 , 39 ].…”