Mar 28, · Developmental trauma starts in utero when we don’t have much more than a brain stem, and goes on during the pre-conscious years. It can continue until 24 or 36 months depending on when the thinking brain (frontal cortex) comes on line. That’s up to 45 months living in general anxiety to non-stop terror — before age 3. Oct 08, · Head Start and Early Head Start leaders and staff can use these resources to learn about adult trauma and strategies for self-care and healing. This series can help build knowledge and skills for a program-wide trauma-informed culture.