The frontal lobes are the last area of the brain to mature and are responsible for important cognitive functions like memory, abstract thinking, planning, and impulse control. Early experiences and the environment a child develops in, both prenatally and postnatally, can impact brain development and structure. High levels of stress or anxiety experienced by the mother during pregnancy and lack of responsive caregiving during infancy can negatively impact brain development and increase risks of developmental and mental health issues later in life. Parental sensitivity and secure parent-child attachment during early childhood are associated with larger brain volumes and healthier brain development.