The frontal lobe is typically considered to be fully developed in females around the age of 25. This area of the brain is responsible for a range of important functions including decision making, impulse control, and emotional regulation.
While the frontal lobe starts developing during early childhood, it continues to mature and evolve throughout adolescence and into the mid-20s. This prolonged development is linked to various factors including genetic, environmental, and social influences. Research indicates that females generally reach full maturity in brain development a bit earlier than males, which may contribute to differences observed in behavior and cognitive function during teenage years and early adulthood.