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What is age 39 considered?: Understanding the Transition from Early to Middle Adulthood

According to research published by ScienceDirect, the period of early adulthood is often considered to last until age 39. This means that for many, turning 39 marks the final year of this developmental stage, with the transition to middle age just around the corner. The answer to "What is age 39 considered?" is complex, as it sits at the cusp of early and middle adulthood, a time of significant reflection and change.