The trauma is premature maternal separation or multiple placements in foster care. (instituteforattachment.ong)
Environmental enrichment reverses the effects of maternal separation on stress reactivity. (DropOutPrevention.org)
This is the study which promoted the now - famous Harry Harlow to experiment with Rhesus monkeys in finding out the effects of maternal separation on infants. (thefashionablebambino.com)